dt-bindings: arm: mediatek: add mt8370-evk board

dt-bindings: arm: mediatek: add mt8370-evk board

1. Add compatible for MT8370.
2. Add bindings for the MediaTek mt8370-evk board, also known
as the "Genio 510-EVK".

The MT8370, MT8390 and MT8188 belong to the same SoC family.
It is a less powerful variant of MT8390 SoC and their main
differences are:
 - Arm Cortex-A55 cores number (4 vs 6)
 - Arm Cortex-A78 core speed (2.0 GHz vs 2.2 Ghz)
 - Arm Mali-G57 GPU core number (2 vs 3)

Like MT8390, MT8370 hardware register maps are identical to MT8188.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Link: https://lore.kernel.org/r/20250206-dts_mt8370-genio-510-v3-1-5ca5c3257a4c@collabora.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>