dt-bindings: arm: mediatek: Add grinn,genio-700-sbc

Add device tree bindings support for the Grinn GenioSBC-700, a
single-board computer based on the MediaTek Genio 700 SoC.

More details about the hardware:
- https://grinn-global.com/products/grinn-geniosom-700
- https://grinn-global.com/products/grinn-genioboard-edge-ai-sbc



Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Mateusz Koza <mateusz.koza@grinn-global.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250908130620.2309399-3-mateusz.koza@grinn-global.com


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