drm/amdgpu: print smc fw info in CGS.

The non-powerplay code handles this directly.  Do
it in cgs for powerplay.

Signed-off-by: yanyang1 <Young.Yang@amd.com>
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>