drm/amdgpu: correct mca ipid die/socket/addr decode

correct mca ipid die/socket/addr decode

v2: squash in fix from Yang

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>