drm/amdgpu/gfx9: Update gfx9 golden settings.

Update the goldensettings for vega20.

Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>