dt-bindings: arm: rockchip: Add Anbernic RG353V and RG353VS

Add entry for the Anbernic RG353V and RG353VS handheld devices.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221028184045.13113-2-macroalpha82@gmail.com


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