drm/amdgpu: fix fence memory leak in wait_all_fence V2

V2: remove **array method, directly fence_put after fence wait.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <chrstian.koenig@amd.com>
Reviewed-by: Ken Wang <Qingqing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>