arm64: dts: mediatek: mt8395-genio-1200-evk: Add display on DSI0

This board has a Startek KD070FHFID078 MIPI-DSI panel on the DSI0
connector, so add and configure the pipeline connecting VDOSYS0
components to DSI0, with the needed pinctrl and display nodes in
devicetree.

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Link: https://lore.kernel.org/r/20250224-mt8395-genio-1200-evk-enable-dsi-panel-v1-1-74f31cf48a43@collabora.com


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>