dts: arm64: mediatek: mt8188: Update OVL compatible from MT8183 to MT8195

dts: arm64: mediatek: mt8188: Update OVL compatible from MT8183 to MT8195

The OVL hardware capabilities have changed starting from MT8195,
making the MT8183 compatible no longer applicable.
Therefore, it is necessary to update the OVL compatible from MT8183 to
MT8195.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Fixes: 7075b21d1a8e ("arm64: dts: mediatek: mt8188: Add display nodes for vdosys0")
Link: https://lore.kernel.org/r/20241219181531.4282-4-jason-jh.lin@mediatek.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>