arm64: dts: rockchip: add infrared receiver node to rockpro64

This adds the RockPro64’s infrared receiver to its dtsi.  The configuration is
almost the same as on rk3328-rock64, except for the GPIO pins, and thus adapted
from there.

Signed-off-by: Thomas Schneider <qsx@chaotikum.eu>
Link: https://lore.kernel.org/r/20210310122821.126408-1-qsx@chaotikum.eu


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