dt-bindings: arm: rockchip: Add Rockchip RK3128 Evaluation board

Add Rockchip RK3128 Evaluation board.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/dca18633-54d4-1264-725c-213d82fdf1c5@gmail.com


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