1. expand rlcg interface for gc & mmhub indirect access
2. add rlcg interface for no kiq

v2: squash in fix for gfx9 (Changfeng)
Signed-off-by: NPeng Ju Zhou <PengJu.Zhou@amd.com>
Reviewed-by: NEmily.Deng <Emily.Deng@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>