soc: mediatek: Prepare MMSYS for DDP routing using function call

[Yongqiang Niu]

The following series are intended to prepare the mtk-mmsys driver to
allow different DDP (Data Display Path) function call per SoC.

base change:
https://patchwork.kernel.org/project/linux-mediatek/patch/20201006193320.405529-4-enric.balletbo@xxxxxxxxxxxxx/

Change since v2:
- fix review issue in v2
- add 8183 mmsys function call
- add 8192 new component
- add 8192 mmsys function call