drm/amdgpu: Move initialization of xcp before kfd

After partition switch, fill all relevant xcp information before kfd
starts initialization.

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>