🎨 MPX ARM Mini pins cleanup (#23113)

Marlin/src/pins/stm32f1/pins_MINGDA_MPX_ARM_MINI.h

 #pragma once
 
 /**
- * MKS Robin mini (STM32F103VET6) board pin assignments
+ * MPX ARM MINI (STM32F103ZET6) board pin assignments
  */
 
 #if NOT_TARGET(STM32F1, STM32F1xx)
   #error "Oops! Select an STM32F1 board in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
-  #error "MKS Robin supports up to 2 hotends / E-steppers. Comment out this line to continue."
+#elif HOTENDS > 1 || E_STEPPERS > 1
+  #error "MPX ARM Mini only supports one hotend / E-stepper. Comment out this line to continue."
 #endif
 
-#define BOARD_INFO_NAME "Mingda MPX_ARM_MINI"
+#define BOARD_INFO_NAME "Mingda MPX ARM Mini"
 
 #define BOARD_NO_NATIVE_USB
 #define DISABLE_DEBUG
 // Limit Switches
 //
 #define X_MIN_PIN                           PD6
-#define X_MAX_PIN                           PG15
+#define X_MAX_PIN                           PG15 // To double check
 #define Y_MIN_PIN                           PG9
-#define Y_MAX_PIN                           PG14
+#define Y_MAX_PIN                           PG14 // To double check
 #define Z_MIN_PIN                           PG10
 #define Z_MAX_PIN                           PG13
 
 // TFT with FSMC interface
 //
 #if HAS_FSMC_TFT
-  /**
-   * Note: MKS Robin TFT screens use various TFT controllers
-   * Supported screens are based on the ILI9341, ST7789V and ILI9328 (320x240)
-   * ILI9488 is not supported
-   * Define init sequences for other screens in u8g_dev_tft_320x240_upscale_from_128x64.cpp
-   *
-   * If the screen stays white, disable 'TFT_RESET_PIN'
-   * to let the bootloader init the screen.
-   *
-   * Setting an 'TFT_RESET_PIN' may cause a flicker when entering the LCD menu
-   * because Marlin uses the reset as a failsafe to revive a glitchy LCD.
-   */
   #define TFT_RESET_PIN                     PF15
   #define TFT_BACKLIGHT_PIN                 PF11
 
 #endif
 
 #if NEED_TOUCH_PINS
-  #define TOUCH_CS_PIN                      PA4   // SPI2_NSS
-  #define TOUCH_SCK_PIN                     PA5   // SPI2_SCK
-  #define TOUCH_MISO_PIN                    PA6   // SPI2_MISO
-  #define TOUCH_MOSI_PIN                    PA7   // SPI2_MOSI
+  #define TOUCH_CS_PIN                      PA4   // SPI1_NSS
+  #define TOUCH_SCK_PIN                     PA5   // SPI1_SCK
+  #define TOUCH_MISO_PIN                    PA6   // SPI1_MISO
+  #define TOUCH_MOSI_PIN                    PA7   // SPI1_MOSI
 #endif