Move M280 to cpp

Marlin/src/Marlin.cpp

   return false;
 }
 
-#if HAS_SERVOS
-  #include "gcode/control/M280.h"
-#endif
-
 #if HAS_BUZZER
   #include "gcode/lcd/M300.h"
 #endif

Marlin/src/gcode/control/M280.h → Marlin/src/gcode/control/M280.cpp

  *
  */
 
+#include "../../inc/MarlinConfig.h"
+
+#if HAS_SERVOS
+
+#include "../gcode.h"
+#include "../../Marlin.h" // for servo[]
+
 /**
  * M280: Get or set servo position. P<index> [S<angle>]
  */
-void gcode_M280() {
+void GcodeSuite::M280() {
   if (!parser.seen('P')) return;
   const int servo_index = parser.value_int();
   if (WITHIN(servo_index, 0, NUM_SERVOS - 1)) {
     SERIAL_ECHOLNPGM(" out of range");
   }
 }
+
+#endif // HAS_SERVOS

Marlin/src/gcode/gcode.cpp

 extern void gcode_M165();
 extern void gcode_M240();
 extern void gcode_M250();
-extern void gcode_M280();
 extern void gcode_M300();
 extern void gcode_M301();
 extern void gcode_M302();
       case 226: M226(); break;    // M226: Wait until a pin reaches a state
 
       #if HAS_SERVOS
-        case 280: // M280: Set servo position absolute
-          gcode_M280();
-          break;
-      #endif // HAS_SERVOS
+        case 280: M280(); break;  // M280: Set servo position absolute
+      #endif
 
       #if HAS_BUZZER
         case 300: // M300: Play beep tone