[BLOCK] ll_rw_blk: fix setting of ->ordered on init

This makes XFS barrier mounts succeed on my SCSI system.
Signed-off-by: NTetsuo Takata <takatatt@intellilink.co.jp>
Signed-off-by: NJens Axboe <axboe@suse.de>

block/ll_rw_blk.c

@@ -332,6 +332,7 @@ int blk_queue_ordered(request_queue_t *q, unsigned ordered,
 		return -EINVAL;
 	}
 
+	q->ordered = ordered;
 	q->next_ordered = ordered;
 	q->prepare_flush_fn = prepare_flush_fn;