Document dt-bindings for RK3308 IO voltage domains.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240521211029.1236094-10-jonas@kwiboo.seSigned-off-by: Heiko Stuebner <heiko@sntech.de>