usb: dwc3: ep0: rename dwc3_ep0_complete_req to dwc3_ep0_complete_status

That's a much more intuitive name as that function
is only called at the completion of a Status Phase.

It also matches dwc3_ep0_complete_data() for
the completion of Data Phase.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/dwc3/ep0.c

@@ -722,7 +722,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
 	}
 }
 
-static void dwc3_ep0_complete_req(struct dwc3 *dwc,
+static void dwc3_ep0_complete_status(struct dwc3 *dwc,
 		const struct dwc3_event_depevt *event)
 {
 	struct dwc3_request	*r;
@@ -773,7 +773,7 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 
 	case EP0_STATUS_PHASE:
 		dev_vdbg(dwc->dev, "Status Phase\n");
-		dwc3_ep0_complete_req(dwc, event);
+		dwc3_ep0_complete_status(dwc, event);
 		break;
 	default:
 		WARN(true, "UNKNOWN ep0state %d\n", dwc->ep0state);