convert the SCSI ULDs to the atomic queue limits API v2

[Martin K. Petersen]

Christoph,

> The patches are against Jens' block-6.10 tree.  Due to the amount of
> block layer changes in here, and other that will depend on it, it
> would be good if this could eventually be merged through the block
> tree, or at least a shared branch between the SCSI and block trees.

If you have other block layer changes depending on this series we'll
probably need a shared branch. I'll need to make several changes to sd.c
to fix reported issues, including a couple in the zeroing/discard
department.

No objections to your series so far. Just trying to reconcile your
changes with mine...

-- 
Martin K. Petersen	Oracle Linux Engineering