Fix SD SPI Speed override, FTDI mesh edit (#20657)

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

Marlin/src/inc/Conditionals_LCD.h

@@ -1045,11 +1045,6 @@
   #define INVERT_E_DIR false
 #endif
 
-// Fallback SPI Speed for SD
-#if ENABLED(SDSUPPORT) && !defined(SD_SPI_SPEED)
-  #define SD_SPI_SPEED SPI_FULL_SPEED
-#endif
-
 /**
  * This setting is also used by M109 when trying to calculate
  * a ballpark safe margin to prevent wait-forever situation.

Marlin/src/inc/Conditionals_post.h

@@ -2708,6 +2708,11 @@
   #endif
 #endif
 
+// Fallback SPI Speed for SD
+#if ENABLED(SDSUPPORT) && !defined(SD_SPI_SPEED)
+  #define SD_SPI_SPEED SPI_FULL_SPEED
+#endif
+
 // Defined here to catch the above defines
 #if ENABLED(SDCARD_SORT_ALPHA) && (FOLDER_SORTING || ENABLED(SDSORT_GCODE))
   #define HAS_FOLDER_SORTING 1