dt-bindings: soc: mediatek: Add support for MT8188 VPPSYS

Add compatible for MT8188 VPP mutex, having different bits to activate
mute for various hardware IPs.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240322092845.381313-2-angelogioacchino.delregno@collabora.com


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>