dt-bindings: arm: rockchip: Add Anbernic RG351V

The Anbernic RG351V is a portable gaming console from Anbernic with the
RK3326 SoC.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231120230131.57705-2-macroalpha82@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>