drm/amdgpu: add mmhub v3_0_1 headers

Add mmhub v3_0_1 headers, because there are many differeces with v3_0_0.

v2: squash in updates (Alex)

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>