Add HAS_FAST_MOVES

Marlin/src/gcode/gcode.cpp

   switch (parser.command_letter) {
     case 'G': switch (parser.codenum) {
 
-      case 0: case 1: G0_G1(                                      // G0: Fast Move, G1: Linear Move
-                        #if IS_SCARA || defined(G0_FEEDRATE)
-                          parser.codenum == 0
-                        #endif
-                      );
-                      break;
+      case 0: case 1:                                             // G0: Fast Move, G1: Linear Move
+        G0_G1(TERN_(HAS_FAST_MOVES, parser.codenum == 0)); break;
 
       #if ENABLED(ARC_SUPPORT) && DISABLED(SCARA)
         case 2: case 3: G2_G3(parser.codenum == 2); break;        // G2: CW ARC, G3: CCW ARC
 
       #if HAS_LEVELING
         case 29:                                                  // G29: Bed leveling calibration
-          #if ENABLED(G29_RETRY_AND_RECOVER)
-            G29_with_retry();
-          #else
-            G29();
-          #endif
+          TERN(G29_RETRY_AND_RECOVER, G29_with_retry, G29)();
           break;
-      #endif // HAS_LEVELING
+      #endif
 
       #if HAS_BED_PROBE
         case 30: G30(); break;                                    // G30: Single Z probe

Marlin/src/gcode/gcode.h

   #include "../feature/encoder_i2c.h"
 #endif
 
+#if IS_SCARA || defined(G0_FEEDRATE)
+  #define HAS_FAST_MOVES 1
+#endif
+
 enum AxisRelative : uint8_t { REL_X, REL_Y, REL_Z, REL_E, E_MODE_ABS, E_MODE_REL };
 
 class GcodeSuite {
 
 private:
 
-  static void G0_G1(
-    #if IS_SCARA || defined(G0_FEEDRATE)
-      const bool fast_move=false
-    #endif
-  );
+  static void G0_G1(TERN_(HAS_FAST_MOVES, const bool fast_move=false));
 
   TERN_(ARC_SUPPORT, static void G2_G3(const bool clockwise));
 

Marlin/src/gcode/motion/G0_G1.cpp

 /**
  * G0, G1: Coordinated movement of X Y Z E axes
  */
-void GcodeSuite::G0_G1(
-  #if IS_SCARA || defined(G0_FEEDRATE)
-    const bool fast_move/*=false*/
-  #endif
-) {
+void GcodeSuite::G0_G1(TERN_(HAS_FAST_MOVES, const bool fast_move/*=false*/)) {
 
   if (IsRunning()
     #if ENABLED(NO_MOTION_BEFORE_HOMING)