drm/amdgpu: fix list not initialized

Otherwise, cpu stuck for 22s with kernel panic.

Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chunming Zhou 2018-04-18 18:35:09 +08:00 • committed by Alex Deucher
commit 7fd645f258