skd: Avoid that gcc 7 warns about fall-through when building with W=1

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/skd_main.c

@@ -2340,7 +2340,7 @@ static void skd_resolve_req_exception(struct skd_device *skdev,
 			blk_requeue_request(skdev->queue, skreq->req);
 			break;
 		}
-	/* fall through to report error */
+		/* fall through */
 
 	case SKD_CHECK_STATUS_REPORT_ERROR:
 	default: