drm/amdgpu: add yellow carp asic header files (v3)

This patch is to add yellow carp asic header files.

v2: squash in updates (Alex)
v3: squash in DCN updates (Alex)

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