iommu/vt-d: Split piotlb invalidation into range and all

iommu/vt-d: Split piotlb invalidation into range and all

Currently these call chains are muddled up by using npages=-1, but only
one caller has the possibility to do both options.

Simplify qi_flush_piotlb() to qi_flush_piotlb_all() since all callers
pass npages=-1.

Split qi_batch_add_piotlb() into qi_batch_add_piotlb_all() and related
helpers.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v1-f175e27af136+11647-iommupt_inv_vtd_jgg@nvidia.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>