arm64: dts: rockchip: Add io-domains to rk3308-rock-pi-s

The VCCIO4 io-domain used for WiFi/BT is using 1v8 IO signal voltage.

Add io-domains node with the VCCIO supplies connected on the board.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20240521211029.1236094-13-jonas@kwiboo.se


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