By this, we can avoid to pass in the VRAM address on every table transferring. That puts extra unnecessary traffics on SMU on some cases(e.g. polling the amdgpu_pm_info sysfs interface). V2: document what the driver table is for and how it works Signed-off-by: Evan Quan <evan.quan@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>