[PATCH] nvme-pci: fix PRP pool size

[Keith Busch]

On Tue, Aug 18, 2020 at 07:51:59PM +0200, Christoph Hellwig wrote:
> All operations are based on the controller, not the host page size.
> Switch the dma pool to use the controller page size as well to avoid
> massive overallocations on large page size systems.

Oof, we've been over-allocating for a while.

Reviewed-by: Keith Busch <kbusch at kernel.org>