drm/amdgpu: use kernel fence interface when possible

Signed-off-by: monk.liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
monk.liu 2015-07-30 14:56:18 +08:00 • committed by Alex Deucher
commit 2e536084f2