usb: gadget: udc: remove bogus NULL check

"ep" isn't NULL here, and static checkers complain because we
dereferenced it on the previous line.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/bdc/bdc_ep.c

@@ -719,7 +719,7 @@ static int ep_queue(struct bdc_ep *ep, struct bdc_req *req)
 	int ret = 0;
 
 	bdc = ep->bdc;
-	if (!req || !ep || !ep->usb_ep.desc)
+	if (!req || !ep->usb_ep.desc)
 		return -EINVAL;
 
 	req->usb_req.actual = 0;