Ford: fix counter in LateralMotionControl2 message (#31806)

The counter should be between 0-15 inclusive. This only affects CAN FD cars.

selfdrive/car/ford/carcontroller.py

@@ -73,7 +73,7 @@ class CarController(CarControllerBase):
       if self.CP.flags & FordFlags.CANFD:
         # TODO: extended mode
         mode = 1 if CC.latActive else 0
-        counter = (self.frame // CarControllerParams.STEER_STEP) % 0xF
+        counter = (self.frame // CarControllerParams.STEER_STEP) % 0x10
         can_sends.append(fordcan.create_lat_ctl2_msg(self.packer, self.CAN, mode, 0., 0., -apply_curvature, 0., counter))
       else:
         can_sends.append(fordcan.create_lat_ctl_msg(self.packer, self.CAN, CC.latActive, 0., 0., -apply_curvature, 0.))