block: factor out a bio_integrity_setup_default helper

block: factor out a bio_integrity_setup_default helper

Add a helper to set the seed and check flag based on useful defaults
from the profile.

Note that this includes a small behavior change, as we now only set the
seed if any action is set, which is fine as nothing will look at it
otherwise.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Tested-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>