mtk-mmsys: Change mtk-mmsys & mtk-mutex to modules

Change mtk-mmsys & mtk-mutex to modules for gki

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221118063018.13520-1-yongqiang.niu@mediatek.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>