Update configurations with SPI_SPEED

- Include aligned comment about new SDSUPPORT behavior

Marlin/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SDSLOW // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
-//#define SDEXTRASLOW // Use even slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/Felix/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/Felix/Configuration_DUAL.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/Hephestos/Configuration.h

 #define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/K8200/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

 #define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 #define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/RigidBot/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
 #define SPI_SPEED SPI_EIGHTH_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder

Marlin/example_configurations/SCARA/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/TAZ4/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 #define ENCODER_PULSES_PER_STEP 2 // Increase if you have a high resolution encoder
 #define ENCODER_STEPS_PER_MENU_ITEM 1 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/WITBOX/Configuration.h

 #define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/adafruit/ST7565/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
+#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/delta/biv2.5/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/delta/generic/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/delta/kossel_mini/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/delta/kossel_pro/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/makibox/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 #define SDSUPPORT // Enable SD Card Support in Hardware Console
-#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                  // Changed behaviour! If you need SDSUPPORT uncomment it!
+#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking

Marlin/example_configurations/tvrrug/Round2/Configuration.h

 //#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
-// Changed behaviour! If you need SDSUPPORT uncomment it!
-//#define SPI_SPEED SPI_HALF_SPEED // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
+                    // Changed behaviour! If you need SDSUPPORT uncomment it!
+//#define SPI_SPEED SPI_HALF_SPEED // (also SPI_QUARTER_SPEED, SPI_EIGHTH_SPEED) Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking