usb: dwc3: gadget: drop unnecessary loop when cleaning up TRBs

Now that we're using XFERINPROGRESS for all endpoint
types (except Control), we will *always* be completing
one TRB at a time, so it's safe to remove the loop
from dwc3_cleanup_done_reqs.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/gadget.c

@@ -1855,7 +1855,6 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
 	unsigned int		i;
 	int			ret;
 
-	do {
 	req = next_request(&dep->req_queued);
 	if (!req) {
 		WARN_ON_ONCE(1);
@@ -1874,14 +1873,10 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
 				event, status);
 		if (ret)
 			break;
-		}while (++i < req->request.num_mapped_sgs);
+	} while (++i < req->request.num_mapped_sgs);
 
 	dwc3_gadget_giveback(dep, req, status);
 
-		if (ret)
-			break;
-	} while (1);
-
 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
 			list_empty(&dep->req_queued)) {
 		if (list_empty(&dep->request_list)) {