drm/amdgpu : Generate XGMI topology info from driver level

Driver will save an array of XGMI hive info, each hive will have a list of devices
that have the same hive ID.

Signed-off-by: Shaoyun Liu <Shaoyun.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>