usb: mtu3: clear u1/u2_enable to 0 in mtu3_gadget_reset

when the device is reset by host, the status of u1_enable and
u2_enable should also be restored to default value.
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/mtu3/mtu3_gadget.c

@@ -728,5 +728,7 @@ void mtu3_gadget_reset(struct mtu3 *mtu)
 	mtu->address = 0;
 	mtu->ep0_state = MU3D_EP0_STATE_SETUP;
 	mtu->may_wakeup = 0;
+	mtu->u1_enable = 0;
+	mtu->u2_enable = 0;
 	mtu->delayed_status = false;
 }