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>

[ upstream commit: adeb5d2a4ba47910238b3c4f5fd960cc0c26a98b ]

(cherry picked from commit e291d457b0378f2cb3d3ebb597032ca862cdb973)
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>