soc: mediatek: mt8365-mmsys: add DPI/HDMI display path

Right now only the DSI path connections are described in the mt8365
mmsys driver. The external path will be DPI/HDMI. This commit adds
the connections for DPI/HDMI.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://lore.kernel.org/r/20220530201436.902505-5-fparent@baylibre.com


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