arm64: dts: rockchip: Add Radxa ROCK S0

Radxa ROCK S0 is a single-board computer based on the Rockchip RK3308B
SoC in an ultra-compact form factor.

Add initial support for eMMC, SD-card, Ethernet, WiFi/BT and USB.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20240521212247.1240226-3-jonas@kwiboo.se


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