iommu/amd: Update logging information for new event type

A new events have been defined in the AMD IOMMU spec:

0x09 - "invalid PPR request"

Add support for logging this type of event.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
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Signed-off-by: Joerg Roedel <jroedel@suse.de>