drm/amdgpu: remove unused member

This lock isn't used any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-04-19 09:57:21 +02:00 • committed by Alex Deucher
commit b9245b9498