drm/amdgpu: add hdp flush for gfx8 compute ring

We had forgotten to register the callback.

Signed-off-by: monk.liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: jammy zhou <jammy.zhou@amd.com>
This commit is contained in:
monk.liu 2015-06-03 16:32:49 +08:00 • committed by Alex Deucher
commit 35074d2d40