Fix LCD sanity check (#14678)

Marlin/src/inc/SanityCheck.h

   + (ENABLED(U8GLIB_SSD1306) && DISABLED(IS_U8GLIB_SSD1306)) \
   + (ENABLED(MINIPANEL) && DISABLED(MKS_MINI_12864)) \
   + (ENABLED(REPRAPWORLD_KEYPAD) && DISABLED(IS_RRW_KEYPAD)) \
-  + (ENABLED(EXTENSIBLE_UI) && DISABLED(IS_EXTUI))
+  + (ENABLED(EXTENSIBLE_UI) && DISABLED(IS_EXTUI)) \
   + (ENABLED(ULTIPANEL) && DISABLED(IS_ULTIPANEL)) \
   + ENABLED(RADDS_DISPLAY) \
   + ENABLED(ULTIMAKERCONTROLLER) \