arm64: dts: rockchip: Add HINLINK H68K

arm64: dts: rockchip: Add HINLINK H68K

The HINLINK H68K is a development board with the
Rockchip RK3568 SoC. It has the following features:

- 2/4GB LPDDR4
- 1x HDMI Type A
- 3.5mm jack with mic
- 1x PCIE 2.0 WiFi slot
- 1x USB 3.0, 2x USB 2.0
- 2x 1GbE RTL8211F Ethernet
- 2x 2.5GbE RTL8125B Ethernet
- MicroSD card slot / eMMC 32GB

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20250818100009.170202-4-amadeus@jmu.edu.cn
Signed-off-by: Heiko Stuebner <heiko@sntech.de>