iommu/amd: Add support for RMP_PAGE_FAULT and RMP_HW_ERR

IOMMU SNP support introduces two new IOMMU events:
  * RMP Page Fault event
  * RMP Hardware Error event

Hence, add reporting functions for these events.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Link: https://lore.kernel.org/r/20200923121347.25365-3-suravee.suthikulpanit@amd.com


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