arm64: dts: mediatek: mt8192: Add thermal nodes and thermal zones

Add thermal nodes and thermal zones for the mt8192.

The mt8192 SoC has several hotspots around the CPUs.
Specify the targeted temperature threshold to apply the mitigation
and define the associated cooling devices.

Signed-off-by: Balsam CHIHI <bchihi@baylibre.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
[bero@baylibre.com: cosmetic changes, reduce lvts_ap size]
Signed-off-by: Bernhard Rosenkränzer <bero@baylibre.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>