drm/amdgpu: add MMHUB 3.3.1 support

This patch to add MMHUB 3.3.1 support.

v2: squash in fault info fix (Alex)

Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>