arm64: dts: rockchip: Add dts for rockchip rk3566 box demo board

This is a rk3566 tv box  evaluation demo board.

Specification:
- Rockchip RK3566
- DDR4 4GB
- TF sd scard slot
- eMMC
- AP6398S for WiFi + BT
- Gigabit ethernet
- HDMI out
- USB HOST 2.0 x 2
- USB 3.0 x 1
- USB OTG 2.0  x 1
- 12V DC Power supply

Signed-off-by: Piotr Oniszczuk <piotr.oniszczuk@gmail.com>
Signed-off-by: Andy Yan <andyshrk@163.com>
Link: https://lore.kernel.org/r/20221105100012.958252-1-andyshrk@163.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>