arm64: dts: rockchip: Add rk3588 evb2 board

General features for rk3588 evb2 board:
- Rockchip RK3588
- LPDDR4/4X
- eMMC5.1
- RK806-2x2pcs + DiscretePower
- 1x HDMI2.1 TX / HDMI2.0 RX
- 1x full size DisplayPort
- 3x USB3.0 Host
- 1x USB2.0 Host
- WIFI/BT

Tested with HDMI/GPU/USB2.0/USB3.0/WIFI module.

Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
Link: https://lore.kernel.org/r/20250418014757.336-3-kernel@airkyi.com


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