Apply #elif in LCD conditionals

Marlin/Conditionals_LCD.h

   #define LCD_HAS_DIRECTIONAL_BUTTONS (BUTTON_EXISTS(UP) || BUTTON_EXISTS(DWN) || BUTTON_EXISTS(LFT) || BUTTON_EXISTS(RT))
 
   #if ENABLED(CARTESIO_UI)
+
     #define DOGLCD
     #define ULTIPANEL
     #define NEWPANEL
     #define DEFAULT_LCD_CONTRAST 90
     #define LCD_CONTRAST_MIN 60
     #define LCD_CONTRAST_MAX 140
-  #endif
 
-  #if ENABLED(MAKRPANEL) || ENABLED(MINIPANEL)
+  #elif ENABLED(MAKRPANEL) || ENABLED(MINIPANEL)
+
     #define DOGLCD
     #define ULTIPANEL
     #define NEWPANEL
     #define DEFAULT_LCD_CONTRAST 17
-  #endif
 
-  #if ENABLED(miniVIKI) || ENABLED(VIKI2) || ENABLED(ELB_FULL_GRAPHIC_CONTROLLER)
+  #elif ENABLED(BQ_LCD_SMART_CONTROLLER)
+
+    #define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER
+    #define LONG_FILENAME_HOST_SUPPORT
+
+  #elif ENABLED(miniVIKI) || ENABLED(VIKI2) || ENABLED(ELB_FULL_GRAPHIC_CONTROLLER)
+
     #define ULTRA_LCD  //general LCD support, also 16x2
     #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
     #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
       #define SD_DETECT_INVERTED
     #endif
 
-  #endif
+  #elif ENABLED(OLED_PANEL_TINYBOY2)
 
-  #if ENABLED(OLED_PANEL_TINYBOY2)
     #define U8GLIB_SSD1306
     #define ULTIPANEL
     #define NEWPANEL
     #define REVERSE_ENCODER_DIRECTION
     #define REVERSE_MENU_DIRECTION
+
+  #elif ENABLED(RA_CONTROL_PANEL)
+
+    #define LCD_I2C_TYPE_PCA8574
+    #define LCD_I2C_ADDRESS 0x27   // I2C Address of the port expander
+    #define ULTIPANEL
+    #define NEWPANEL
+
+  #elif ENABLED(REPRAPWORLD_GRAPHICAL_LCD)
+
+    #define DOGLCD
+    #define U8GLIB_ST7920
+    #define ULTIPANEL
+    #define NEWPANEL
+
   #endif
 
   // Generic support for SSD1306 / SH1106 OLED based LCDs.
     #define ULTIMAKERCONTROLLER
   #endif
 
-  #if ENABLED(BQ_LCD_SMART_CONTROLLER)
-    #define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER
-    #ifndef LONG_FILENAME_HOST_SUPPORT
-      #define LONG_FILENAME_HOST_SUPPORT
-    #endif
-  #endif
-
   #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
     #define DOGLCD
     #define U8GLIB_ST7920
     #endif
   #endif
 
-  #if ENABLED(RA_CONTROL_PANEL)
-    #define LCD_I2C_TYPE_PCA8574
-    #define LCD_I2C_ADDRESS 0x27   // I2C Address of the port expander
-    #define ULTIPANEL
-    #define NEWPANEL
-  #endif
-
-  #if ENABLED(REPRAPWORLD_GRAPHICAL_LCD)
-    #define DOGLCD
-    #define U8GLIB_ST7920
-    #define ULTIPANEL
-    #define NEWPANEL
-  #endif
-
   /**
    * I2C PANELS
    */
 
   #if ENABLED(LCD_I2C_SAINSMART_YWROBOT)
+
     // Note: This controller requires F.Malpartida's LiquidCrystal_I2C library
     // https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home
+
     #define LCD_I2C_TYPE_PCF8575
     #define LCD_I2C_ADDRESS 0x27   // I2C Address of the port expander
     #define ULTIPANEL
     #define NEWPANEL
-  #endif
 
-  // PANELOLU2 LCD with status LEDs, separate encoder and click inputs
-  #if ENABLED(LCD_I2C_PANELOLU2)
+  #elif ENABLED(LCD_I2C_PANELOLU2)
+
+    // PANELOLU2 LCD with status LEDs, separate encoder and click inputs
+
     #define LCD_I2C_TYPE_MCP23017
     #define LCD_I2C_ADDRESS 0x20 // I2C Address of the port expander
     #define LCD_USE_I2C_BUZZER //comment out to disable buzzer on LCD
     #define ULTIPANEL
     #define NEWPANEL
-  #endif
 
-  // Panucatt VIKI LCD with status LEDs, integrated click & L/R/U/P buttons, separate encoder inputs
-  #if ENABLED(LCD_I2C_VIKI)
-    // This uses the LiquidTWI2 library v1.2.3 or later ( https://github.com/lincomatic/LiquidTWI2 )
-    // Make sure the LiquidTWI2 directory is placed in the Arduino or Sketchbook libraries subdirectory.
-    // Note: The pause/stop/resume LCD button pin should be connected to the Arduino
-    //       BTN_ENC pin (or set BTN_ENC to -1 if not used)
+  #elif ENABLED(LCD_I2C_VIKI)
+
+    /**
+     * Panucatt VIKI LCD with status LEDs, integrated click & L/R/U/P buttons, separate encoder inputs
+     *
+     * This uses the LiquidTWI2 library v1.2.3 or later ( https://github.com/lincomatic/LiquidTWI2 )
+     * Make sure the LiquidTWI2 directory is placed in the Arduino or Sketchbook libraries subdirectory.
+     * Note: The pause/stop/resume LCD button pin should be connected to the Arduino
+     *       BTN_ENC pin (or set BTN_ENC to -1 if not used)
+     */
     #define LCD_I2C_TYPE_MCP23017
     #define LCD_I2C_ADDRESS 0x20 // I2C Address of the port expander
     #define LCD_USE_I2C_BUZZER //comment out to disable buzzer on LCD (requires LiquidTWI2 v1.2.3 or later)