arm64: dts: mediatek: mt6795: Add ARM CCI-400 node and assign to CPUs

This SoC features an ARM CCI-400 IP: add the required node and
assign the cci control ports to the CPU cores.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220609112303.117928-9-angelogioacchino.delregno@collabora.com


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