dt-bindings: arm: rockchip: Add rk3399 industry evaluation board

Add devicetree binding for the rk3399 industry evaluation board.

Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250506034347.57-2-kernel@airkyi.com


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