Prefix SD SPI pins (SCK, MISO, MOSI, SS) (#20606)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/inc/Conditionals_LCD.h

@@ -1045,9 +1045,9 @@
   #define INVERT_E_DIR false
 #endif
 
-// Fallback SPI Speed
-#ifndef SPI_SPEED
-  #define SPI_SPEED SPI_FULL_SPEED
+// Fallback SPI Speed for SD
+#if ENABLED(SDSUPPORT) && !defined(SD_SPI_SPEED)
+  #define SD_SPI_SPEED SPI_FULL_SPEED
 #endif
 
 /**

Marlin/src/inc/Conditionals_post.h

@@ -2590,10 +2590,10 @@
  */
 #if HAS_MARLINUI_U8GLIB
   #ifndef DOGLCD_SCK
-    #define DOGLCD_SCK  SCK_PIN
+    #define DOGLCD_SCK  SD_SCK_PIN
   #endif
   #ifndef DOGLCD_MOSI
-    #define DOGLCD_MOSI MOSI_PIN
+    #define DOGLCD_MOSI SD_MOSI_PIN
   #endif
 #endif
 
@@ -2683,7 +2683,7 @@
 // Force SDCARD_SORT_ALPHA to be enabled for Graphical LCD on LPC1768
 // on boards where SD card and LCD display share the same SPI bus
 // because of a bug in the shared SPI implementation. (See #8122)
-#if defined(TARGET_LPC1768) && IS_RRD_FG_SC && (SCK_PIN == LCD_PINS_D4)
+#if defined(TARGET_LPC1768) && IS_RRD_FG_SC && (SD_SCK_PIN == LCD_PINS_D4)
   #define SDCARD_SORT_ALPHA         // Keep one directory level in RAM. Changing directory levels
                                     // may still glitch the screen, but LCD updates clean it up.
   #undef SDSORT_LIMIT

Marlin/src/inc/SanityCheck.h

@@ -105,9 +105,9 @@
 #elif defined(USE_AUTOMATIC_VERSIONING)
   #error "USE_AUTOMATIC_VERSIONING is now CUSTOM_VERSION_FILE."
 #elif defined(SDSLOW)
-  #error "SDSLOW deprecated. Set SPI_SPEED to SPI_HALF_SPEED instead."
+  #error "SDSLOW deprecated. Set SD_SPI_SPEED to SPI_HALF_SPEED instead."
 #elif defined(SDEXTRASLOW)
-  #error "SDEXTRASLOW deprecated. Set SPI_SPEED to SPI_QUARTER_SPEED instead."
+  #error "SDEXTRASLOW deprecated. Set SD_SPI_SPEED to SPI_QUARTER_SPEED instead."
 #elif defined(FILAMENT_SENSOR)
   #error "FILAMENT_SENSOR is now FILAMENT_WIDTH_SENSOR."
 #elif defined(ENDSTOPPULLUP_FIL_RUNOUT)