arm64: dts: rockchip: Add Lunzn Fastrhino R66S

Lunzn Fastrhino R66S is a high-performance mini router.

Specification:
- Rockchip RK3568
- 1/2GB LPDDR4 RAM
- SD card slot
- 2x USB 3.0 Port
- 2x 2500 Base-T (PCIe, r8125b)
- 12v DC Jack

Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Link: https://lore.kernel.org/r/20230506061108.17658-2-cnsztl@gmail.com


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