USB: gadget: amd5536udc.c: fix error path

In function udc_probe() call put_device() when device_register() fails.
Signed-off-by: NRahul Ruikar <rahul.ruikar@gmail.com>
Acked-by: NThomas Dahlmann <dahlmann.thomas@arcor.de>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/amd5536udc.c

@@ -3383,8 +3383,10 @@ static int udc_probe(struct udc *dev)
 	udc = dev;
 
 	retval = device_register(&dev->gadget.dev);
-	if (retval)
+	if (retval) {
+		put_device(&dev->gadget.dev);
 		goto finished;
+	}
 
 	/* timer init */
 	init_timer(&udc_timer);