arm64: dts: rockchip: Add OTP device node for RK3308

The RK3308 SoC contains a controller for one-time-programmable memory,
add a device node for it.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20240521211029.1236094-9-jonas@kwiboo.se


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