drm/amdgpu/gfx8: fix CGCG_CGLS handling

When setting up the RLC, only disable the CGCG and
CGLS bits rather than clearing the entire register
to avoid losing the golden settings.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
1 file changed