🚸 Onboard SD for SKR 2.0 / SKR PRO (#23274)

Marlin/src/pins/stm32f4/pins_BTT_SKR_PRO_common.h

@@ -309,7 +309,7 @@
 //
 
 #ifndef SDCARD_CONNECTION
-  #define SDCARD_CONNECTION                  LCD
+  #define SDCARD_CONNECTION              ONBOARD
 #endif
 
 /**               ------                                      ------

Marlin/src/pins/stm32f4/pins_BTT_SKR_V2_0_common.h

@@ -329,7 +329,7 @@
 // SD Connection
 //
 #ifndef SDCARD_CONNECTION
-  #define SDCARD_CONNECTION                  LCD
+  #define SDCARD_CONNECTION              ONBOARD
 #endif
 
 /**