drm/amdgpu: fix vf error handling

The error handling for virtual functions assumed a single
vf per VM and didn't properly account for bare metal.  Make
the error arrays per device and add locking.

Reviewed-by: Gavin Wan <gavin.wan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
4 files changed