drm/amdgpu: add soc config init for GC v12_1

drm/amdgpu: add soc config init for GC v12_1

Add function to initialize soc configuration information
for GC 12.1.0 ASICs.
Use it to map IPs and other SOC related information once IP
configuration information is available through discovery.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>