usb: cdns3: core: fix goto label for error path

The usb_role_switch_register has been already called, so if the
devm_request_irq has failed, it needs to call usb_role_switch_unregister.

Fixes: b1234e3b3b ("usb: cdns3: add runtime PM support")
Signed-off-by: Peter Chen <peter.chen@nxp.com>

drivers/usb/cdns3/core.c

@@ -553,7 +553,7 @@ static int cdns3_probe(struct platform_device *pdev)
 
 		if (ret) {
 			dev_err(cdns->dev, "couldn't register wakeup irq handler\n");
-			goto err3;
+			goto err4;
 		}
 	}