Set external_rev_id and disable cg,pg for now.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NFeifei Xu <Feifei.Xu@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>