drm/amdgpu: Add ATHUB 2.1 header files (v2)
v2: squash in updates (Alex)Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
authored by Yong Zhao and committed by Alex Deucher 5 years ago e54294d6 b4ebd871