Enable gmc block for dimgrey_cavefish, same as sienna_cichlid.
Signed-off-by: NTao Zhou <tao.zhou1@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: NJiansong Chen <Jiansong.Chen@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>