drm/amdgpu: add GMC support for Stoney

Stoney is GMC 8.x.

Signed-off-by: Samuel Li <samuel.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Samuel Li 2015-10-08 16:26:41 -04:00 • committed by Alex Deucher
commit aade2f04f9