drm/amdgpu: update golden setting programming logic

Since from soc15, make sure only AndMasked bit get changed
when applied or_mask

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