iommu/amd: Set the pgsize_bitmap correctly

iommu/amd: Set the pgsize_bitmap correctly

When using io_pgtable the correct pgsize_bitmap is stored in the cfg, both
v1_alloc_pgtable() and v2_alloc_pgtable() set it correctly.

This fixes a bug where the v2 pgtable had the wrong pgsize as
protection_domain_init_v2() would set it and then do_iommu_domain_alloc()
immediately resets it.

Remove the confusing ops.pgsize_bitmap since that is not used if the
driver sets domain.pgsize_bitmap.

Fixes: 134288158a41 ("iommu/amd: Add domain_alloc_user based domain allocation")
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/3-v2-831cdc4d00f3+1a315-amd_iopgtbl_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>