drm/amd/amdgpu: Add missing XGMI hive registers for mmhub 9.4.1

These are used by umr to sort the hive nodes since the kernel
initializes the nodes in order of bus enumeration not XGMI hive
enumeration.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>