drm/amdgpu: Add API to get numa information of XCC

Add interface to get numa information of ACPI XCC object. The interface
uses logical id to identify an XCC.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>