arm64: dts: allwinner: h5: Add NanoPi R1S H5 support

The NanoPi R1S H5 is a open source board made by FriendlyElec.
It has the following features:

- Allwinner H5, Quad-core Cortex-A53
- 512MB DDR3 RAM
- 10/100/1000M Ethernet x 2
- RTL8189ETV WiFi 802.11b/g/n
- USB 2.0 host port (A)
- MicroSD Slot
- Serial Debug Port
- 5V 2A DC power-supply

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210516163523.9484-2-amadeus@jmu.edu.cn