Add a dependency for z servo macros

Marlin/Marlin_main.cpp

@@ -493,9 +493,11 @@ static bool send_ok[BUFSIZE];
 #if HAS_SERVOS
   Servo servo[NUM_SERVOS];
   #define MOVE_SERVO(I, P) servo[I].move(P)
+  #if HAS_Z_SERVO_ENDSTOP
     #define DEPLOY_Z_SERVO() MOVE_SERVO(Z_ENDSTOP_SERVO_NR, z_servo_angle[0])
     #define STOW_Z_SERVO() MOVE_SERVO(Z_ENDSTOP_SERVO_NR, z_servo_angle[1])
   #endif
+#endif
 
 #ifdef CHDK
   millis_t chdkHigh = 0;