dt-bindings: arm: rockchip: Add rk3588 evb2 board

Add devicetree binding for the rk3588 evb2 board.

Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20250418014757.336-2-kernel@airkyi.com


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