dm: missing break in process_queued_bios()

his used to be a fall through case, but we shifted code around and I
think we want a break here now.

Fixes: 4e4cbee9 ("block: switch bios to blk_status_t")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/md/dm-mpath.c

@@ -625,6 +625,7 @@ static void process_queued_bios(struct work_struct *work)
 		case DM_MAPIO_KILL:
 			bio->bi_status = BLK_STS_IOERR;
 			bio_endio(bio);
+			break;
 		case DM_MAPIO_REQUEUE:
 			bio->bi_status = BLK_STS_DM_REQUEUE;
 			bio_endio(bio);