drm/amdgpu: partially revert "modify amdgpu_fence_wait_any() to amdgpu_fence_wait_multiple()" v2

That isn't used any more.

v2: rebase

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>