iommu/vt-d: Remove the remaining pages along the invalidation path

This was only being used to signal that a flush all should be used.
Use mask/size_order >= 52 to signal this instead.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/3-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>