Replace the following two statements by the statement “goto put_nbd;”

	nbd_put(nbd);
	return 0;
Signed-off-by: NSun Ke <sunke32@huawei.com>
Suggested-by: NMarkus Elfring <Markus.Elfring@web.de>
Reviewed-by: NJosef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20210512114331.1233964-3-sunke32@huawei.comSigned-off-by: NJens Axboe <axboe@kernel.dk>