arm64: dts: rockchip: give some life to the rk3328-roc-cc leds

Assign the LEDs to heartbeat and sdcard io, as in other RK boards.

https://github.com/armbian/build/commit/f1affad5c7be62d6e93832af3556c7609edd0858



Suggested-by: Juan Cano <j3cano@outlook.com>
Signed-off-by: Leonidas P. Papadakos <papadakospan@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>