usb: gadget: composite: dequeue cdev->req before free it in composite_dev_cleanup

This patch try to dequeue the cdev->req to guarantee the request is not queued
before free it.
Signed-off-by: NLi Jun <b47624@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/gadget/composite.c

@@ -1956,6 +1956,7 @@ void composite_dev_cleanup(struct usb_composite_dev *cdev)
 	}
 	if (cdev->req) {
 		kfree(cdev->req->buf);
+		usb_ep_dequeue(cdev->gadget->ep0, cdev->req);
 		usb_ep_free_request(cdev->gadget->ep0, cdev->req);
 	}
 	cdev->next_string_id = 0;