Fix Mazda resume spam at standstill

selfdrive/car/mazda/carcontroller.py

@@ -27,6 +27,7 @@ class CarController():
                                                   CS.out.steeringTorque, CarControllerParams)
       self.steer_rate_limited = new_steer != apply_steer
 
+    if c.enabled:
       if CS.out.standstill and frame % 5 == 0:
         # Mazda Stop and Go requires a RES button (or gas) press if the car stops more than 3 seconds
         # Send Resume button at 20hz if we're engaged at standstill to support full stop and go!