dt-bindings: arm: Add NanoPi R1S H5

Add the bindings for NanoPi R1S H5 board.

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210516163523.9484-3-amadeus@jmu.edu.cn