AMD/IOMMU: miscellaneous DTE handling adjustments

AMD/IOMMU: miscellaneous DTE handling adjustments

First and foremost switch boolean fields to bool. Adjust a few related
function parameters as well. Then
- in amd_iommu_set_intremap_table() don't use literal numbers,
- in iommu_dte_add_device_entry() use a compound literal instead of many
  assignments,
- in amd_iommu_setup_domain_device()
  - eliminate a pointless local variable,
  - use || instead of && when deciding whether to clear an entry,
  - clear the I field without any checking of ATS / IOTLB state,
- leave reserved fields unnamed.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Brian Woods <brian.woods@amd.com>