There is nothing to clear -- nbd_device has just been allocated.
Fold nbd_reset() into its other caller, nbd_config_put().
Signed-off-by: NIlya Dryomov <idryomov@gmail.com>
Reviewed-by: NJosef Bacik <jbacik@fb.com>
Signed-off-by: NJens Axboe <axboe@fb.com>