drm/amdgpu: reflect psp xgmi topology info for gfx9.4.3

Similar to GFX9.4.2 non-A+A devices, GFX9.4.3 psp xgmi topology info is
half duplex and requires the driver to fill in the bidirectional info.

Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Reviewed-by: Shiwu Zhang <shiwu.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>