arm64: dts: mediatek: cherry: Add dp-intf ports

Dp-intfs provide the pixel data to edptx and dptx. To support edptx
and dptx, we need to add dp-intf0 and dp-intf1 ports.

Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221110063716.25677-4-rex-bc.chen@mediatek.com


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