block: unexport blk_rq_count_integrity_sg

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Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20240913182854.2445457-9-kbusch@meta.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>