dt-bindings: arm: stm32: Add Plymovent AQM board

Add support for the Plymovent AQM board based on the ST STM32MP151 SoC
to the STM32 devicetree bindings.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250305131425.1491769-3-o.rempel@pengutronix.de


Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>