drm/mediatek: Add mt8188 dpi compatibles and platform data

For MT8188, the vdosys0 only supports 1T1P mode, so we need to
add the compatible for mt8188 edp-intf.

Signed-off-by: xinlei lee <xinlei.lee@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/1666266353-16670-3-git-send-email-xinlei.lee@mediatek.com/


Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>