Provide LONG_FILENAME_LENGTH for headers (#15582)

Marlin/src/lcd/extui_malyan_lcd.cpp

 #include "extensible_ui/ui_api.h"
 
 #include "ultralcd.h"
+#include "../sd/cardreader.h"
 #include "../module/temperature.h"
 #include "../module/stepper.h"
 #include "../module/motion.h"
 #include "../module/printcounter.h"
 #include "../gcode/queue.h"
 
-#if ENABLED(SDSUPPORT)
-  #include "../sd/cardreader.h"
-  #include "../sd/SdFatConfig.h"
-#else
-  #define LONG_FILENAME_LENGTH 0
-#endif
-
 #define DEBUG_OUT ENABLED(DEBUG_MALYAN_LCD)
 #include "../core/debug_out.h"
 

Marlin/src/sd/cardreader.h

 #define IS_SD_PAUSED()    false
 #define IS_SD_FILE_OPEN() false
 
+#define LONG_FILENAME_LENGTH 0
+
 #endif // !SDSUPPORT