iommu/amd: Remove type argument from do_iommu_domain_alloc() and related

do_iommu_domain_alloc() is only called from
amd_iommu_domain_alloc_paging_flags() so type is always
IOMMU_DOMAIN_UNMANAGED. Remove type and all the dead conditionals checking
it.

IOMMU_DOMAIN_IDENTITY checks are similarly obsolete as the conversion to
the global static identity domain removed those call paths.

The caller of protection_domain_alloc() should set the type, fix the miss
in the SVA code.

Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v2-9776c53c2966+1c7-amd_paging_flags_jgg@nvidia.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>