usb: dwc3: gadget: don't redefine 'ret'

we have an extra 'ret' variable shadowing a previous
definition. Remove it.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/dwc3/gadget.c

@@ -1082,8 +1082,6 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
 	 *
 	 */
 	if (dep->flags & DWC3_EP_PENDING_REQUEST) {
-		int	ret;
-
 		/*
 		 * If xfernotready is already elapsed and it is a case
 		 * of isoc transfer, then issue END TRANSFER, so that