arm64: dts: mt8183: Configure CPU cooling

Add two passive trip points at 68°C and 80°C for the CPU temperature.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Michael Kao <michael.kao@mediatek.com>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>