arm64: dts: rockchip: Add ir receiver and leds to Khadas Edge 2

Khadas Edge 2 exposes IR receiver pins as same as TF card via EXTIO. The
IR receiver is connected to MCU and SoC.

The board also has 2 PWM RGB leds. One is controlled by MCU and the
other is controlled by SoC. This commit adds support for the led
controlled by SoC using pwm-leds.

Signed-off-by: Muhammed Efe Cetin <efectn@protonmail.com>
Link: https://lore.kernel.org/r/335629f57e593e20418a4a55a1e662505640cbde.1708381247.git.efectn@protonmail.com


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