block: conding style fixup for blk_queue_max_guaranteed_bio

"static" never goes on a line of its own.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240626142637.300624-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>