drm/amdgpu: use physical AID index for ring name

Use physical AID index for VCN/JPEG ring name instead of
logical AID index.

Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Sonny Jiang <sonny.jiang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>