iommu/amd: Separate page table setup from domain allocation

iommu/amd: Separate page table setup from domain allocation

Currently protection_domain_alloc() allocates domain and also sets up
page table. Page table setup is required for PAGING domain only. Domain
type like SVA doesn't need page table. Hence move page table setup code
to separate function.

Also SVA domain allocation path does not call pdom_setup_pgtable().
Hence remove IOMMU_DOMAIN_SVA type check.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jacob Pan <jacob.pan@linux.microsoft.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20241028093810.5901-8-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>