usb: gadget: udc-core: fix wrong call order

commit 6d258a4c (usb: gadget: udc-core: stop UDC on device-initiated
disconnect) introduced another case of asymmetric calls when issuing
a device-initiated disconnect. Fix it.
Reported-by: NBen Hutchings <ben@decadent.org.uk>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc-core.c

@@ -415,9 +415,9 @@ static ssize_t usb_udc_softconn_store(struct device *dev,
 			usb_gadget_udc_start(udc->gadget, udc->driver);
 		usb_gadget_connect(udc->gadget);
 	} else if (sysfs_streq(buf, "disconnect")) {
+		usb_gadget_disconnect(udc->gadget);
 		if (udc_is_newstyle(udc))
 			usb_gadget_udc_stop(udc->gadget, udc->driver);
-		usb_gadget_disconnect(udc->gadget);
 	} else {
 		dev_err(dev, "unsupported command '%s'\n", buf);
 		return -EINVAL;