block: code cleanup queue_poll_stat_show()

This is a pure code cleanup patch and doesn't change any functionality.
Having multiple coding styles in the code creates confusion when
someone tries to add a new code.

Make queue_poll_stat_show() consistent by adding spaces around binary
operators with the rest of the code.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-mq-debugfs.c

@@ -29,7 +29,7 @@ static int queue_poll_stat_show(void *data, struct seq_file *m)
 	struct request_queue *q = data;
 	int bucket;
 
-	for (bucket = 0; bucket < BLK_MQ_POLL_STATS_BKTS/2; bucket++) {
+	for (bucket = 0; bucket < (BLK_MQ_POLL_STATS_BKTS / 2); bucket++) {
 		seq_printf(m, "read  (%d Bytes): ", 1 << (9 + bucket));
 		print_stat(m, &q->poll_stat[2 * bucket]);
 		seq_puts(m, "\n");