arm64: dts: rockchip: add hdd leds to Qnap-TS433

Add the 4 gpio-controlled LEDs to the Qnap-TS433.

They are meant for individual disk activitivy, but I haven't found a
way for how to connect them to their individual sata slot yet.

Tested-by: Uwe Kleine-König <ukleinek@debian.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20240723195538.1133436-9-heiko@sntech.de