drm/amdgpu: Add pg support for gfxoff for PCO

Add pg support for gfxoff.

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed