MT8173 aal has gamma function but mt8183 aal has no gamma
function, so separate aal sub driver to have a private
data for different SoC.
Signed-off-by: NYongqiang Niu <yongqiang.niu@mediatek.com>
Tested-by: NHsin-Yi Wang <hsinyi@chromium.org>
Signed-off-by: NChun-Kuang Hu <chunkuang.hu@kernel.org>