arm64: dts: rockchip: Add Radxa ROCK 3B

arm64: dts: rockchip: Add Radxa ROCK 3B

The Radxa ROCK 3B is a single-board computer based on the Pico-ITX form
factor (100mm x 75mm). Two versions of the ROCK 3B exists, a community
version based on the RK3568 SoC and an industrial version based on the
RK3568J SoC.

Add initial support for eMMC, SD-card, Ethernet, HDMI, PCIe and USB.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20240627211737.1985549-3-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[ upstream commit: 846ef7748fa9124c8eea76e2d5e833fa69b3ef7c ]

(cherry picked from commit 5416329b387d3c13392f84ba35273a402c7010f8)
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>