Add multi-extruder condition

Marlin/Configuration_adv.h

@@ -1979,7 +1979,7 @@
  * Universal tool change settings.
  * Applies to all types of extruders except where explicitly noted.
  */
-#if EXTRUDERS > 1
+#if HAS_MULTI_EXTRUDER
   // Z raise distance for tool-change, as needed for some extruders
   #define TOOLCHANGE_ZRAISE                 2 // (mm)
   //#define TOOLCHANGE_ZRAISE_BEFORE_RETRACT  // Apply raise before swap retraction (if enabled)
@@ -2043,7 +2043,7 @@
     //#define TOOLCHANGE_PARK_X_ONLY          // X axis only move
     //#define TOOLCHANGE_PARK_Y_ONLY          // Y axis only move
   #endif
-#endif // EXTRUDERS > 1
+#endif // HAS_MULTI_EXTRUDER
 
 /**
  * Advanced Pause