drm/amdgpu/gfx8: add powergating support for CZ/ST

This implements powergating support for CZ/ST asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-05-04 10:07:22 -04:00
commit 2c54716563