drm/amd/pm: Update PPTable struct for beige_goby

Update PPTable structure since SMC#73.9/IFWI-XXX.013

Signed-off-by: Chengming Gui <Jack.Gui@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: jiansong Chen <Jiansong.Chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>