drm/amdgpu: apply gc v9_4_2 golden settings for aldebaran

Those registers should be programmed as one-time initialization

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>