🚸 Home Y before X on belt printers

Marlin/src/inc/Conditionals_LCD.h

@@ -1058,6 +1058,10 @@
   #undef USE_PROBE_FOR_Z_HOMING
 #endif
 
+#if ENABLED(BELTPRINTER) && !defined(HOME_Y_BEFORE_X)
+  #define HOME_Y_BEFORE_X
+#endif
+
 #if Z_HOME_TO_MAX && DISABLED(Z_SAFE_HOMING)
   #define HOME_Z_FIRST // If homing away from BED do Z first
 #endif