Patch LIN_ADVANCE for style and forward-compatibility

Marlin/SanityCheck.h

@@ -351,6 +351,13 @@
 
 #endif // AUTO_BED_LEVELING_FEATURE
 
+/**
+ * Advance Extrusion
+ */
+#if ENABLED(ADVANCE) && ENABLED(LIN_ADVANCE)
+  #error You can enable ADVANCE or LIN_ADVANCE, but not both.
+#endif
+
 /**
  * Filament Width Sensor
  */
@@ -358,7 +365,6 @@
   #error "FILAMENT_WIDTH_SENSOR requires a FILWIDTH_PIN to be defined."
 #endif
 
-
 /**
  * ULTIPANEL encoder
  */