dt-bindings: arm: rockchip: Add RK3588S EVB1 board

dt-bindings: arm: rockchip: Add RK3588S EVB1 board

Add devicetree binding for the Rockchip RK3588S evaluation board.

RK3588S EVB1 board features:
- Rockchip RK3588S
- PMIC: RK806-2x2pcs+DiscretePower
- RAM: LPDDR4/4x 2pcsx 32bit
- ROM: eMMC5.1+ SPI Falsh

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240914095456.2347532-2-damon.ding@rock-chips.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>