arm: dts: rockchip: turn LEDs on at boot for Radxa boards

Basically, Radxa's boards are intended to turn LEDs on at U-Boot.
add `default-state = "on"` to u-boot.dtsi.

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
8 files changed