arm64: dts: mediatek: mt8186: Add CCI node and CCI OPP table

Add a device node for the CCI (cache coherent interconnect) and an OPP
table for it. The OPP table was taken from the downstream ChromeOS
kernel.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230609072906.2784594-2-wenst@chromium.org


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