block: add debugfs stanza for QUEUE_FLAG_NOWAIT

This was missed in 021a244. Leads to the numeric value of
QUEUE_FLAG_NOWAIT (i.e. 29) showing up in
/sys/kernel/debug/block/*/state.

Fixes: 021a244
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Mike Snitzer <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Andres Freund <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

block/blk-mq-debugfs.c

@@ -129,6 +129,7 @@ static const char *const blk_queue_flag_name[] = {
 	QUEUE_FLAG_NAME(PCI_P2PDMA),
 	QUEUE_FLAG_NAME(ZONE_RESETALL),
 	QUEUE_FLAG_NAME(RQ_ALLOC_TIME),
+	QUEUE_FLAG_NAME(NOWAIT),
 };
 #undef QUEUE_FLAG_NAME