arm64: dts: rockchip: add LinkEase EasePi R1

arm64: dts: rockchip: add LinkEase EasePi R1

LinkEase EasePi R1 [1] is a high-performance mini router.

Specification:
- Rockchip RK3568
- 2GB/4GB LPDDR4 RAM
- 16GB on-board eMMC
- 1x M.2 key for 2280 NVMe (PCIe 3.0)
- 1x USB 3.0 Type-A
- 1x USB 2.0 Type-C (for USB flashing)
- 2x 1000 Base-T (native, RTL8211F)
- 2x 2500 Base-T (PCIe, RTL8125B)
- 1x HDMI 2.0 Output
- 12v DC Jack
- 1x Power key connected to PMIC
- 2x LEDs (one static power supplied, one GPIO controlled)

[1] https://doc.linkease.com/zh/guide/easepi-r1/hardware.html

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Liangbin Lian <jjm2473@gmail.com>
Link: https://patch.msgid.link/20251014051226.64255-4-jjm2473@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>