Fix Visual Micro "Arduino IDE for Visual Studio" support (#16418)

Marlin/src/sd/Sd2Card.cpp

@@ -38,7 +38,7 @@
 
 #include "Sd2Card.h"
 
-#include "../Marlin.h"
+#include "../MarlinCore.h"
 
 #if ENABLED(SD_CHECK_AND_RETRY)
   static bool crcSupported = true;

Marlin/src/sd/SdBaseFile.cpp

@@ -33,7 +33,7 @@
 
 #include "SdBaseFile.h"
 
-#include "../Marlin.h"
+#include "../MarlinCore.h"
 SdBaseFile* SdBaseFile::cwd_ = 0;   // Pointer to Current Working Directory
 
 // callback function for date/time

Marlin/src/sd/SdVolume.cpp

@@ -33,7 +33,7 @@
 
 #include "SdVolume.h"
 
-#include "../Marlin.h"
+#include "../MarlinCore.h"
 
 #if !USE_MULTIPLE_CARDS
   // raw block cache

Marlin/src/sd/cardreader.cpp

@@ -26,7 +26,7 @@
 
 #include "cardreader.h"
 
-#include "../Marlin.h"
+#include "../MarlinCore.h"
 #include "../lcd/ultralcd.h"
 #include "../module/planner.h"
 #include "../module/printcounter.h"

Marlin/src/sd/usb_flashdrive/Sd2Card_FlashDrive.cpp

@@ -40,7 +40,7 @@
 
 #if ENABLED(USB_FLASH_DRIVE_SUPPORT)
 
-#include "../../Marlin.h"
+#include "../../MarlinCore.h"
 #include "../../core/serial.h"
 #include "../../module/temperature.h"