board: rockchip: Add Xunlong Orange Pi 5

Xunlong Orange Pi 5 is a single-board computer based on the Rockchip
RK3588S SoC. The board provides abundant interfaces, HDMI output, GPIO
interface, M.2 PCIe2.0, Type-C, Gigabit LAN port, 2*USB2.0, 1*USB3.0,
etc.

Features tested on a Orange Pi 5 4GB v1.2:
- SD-card boot
- SPI Flash boot
- PCIe/NVMe
- USB 2.0 host
- Ethernet

Device tree is imported from linux v6.7-rockchip-dts64-1 tag.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>