drm/amdgpu: add HDP ip block for HDP 4.4.2

Add HDP IP handling for HDP 4.4.2

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <Le.Ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>