drm/amdgpu: group together common fence implementation

And also add some missing function documentation. No functional change.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2015-11-03 12:21:57 +01:00 • committed by Alex Deucher
commit a95e264254