arm64: dts: allwinner: h616: add Orange Pi Zero 2W support

The Orange Pi Zero 2W is a board based on the Allwinner H618 SoC.
It uses the RaspberryPi Zero form factor, with an optional expansion
board, connected via an FPC connector, to provide more connectors.

The base board features:
	- Allwinner H618 SoC (quad Cortex-A53 cores, with 1MB L2 cache)
	- 1, 2 or 4GB of LPDDR4 DRAM
	- SD card socket
	- two USB-C sockets, one UFP, one DFP
	- HDMI connector
	- (yet unsupported) WiFi module
	- 16 MiB SPI flash
	- power supply via the UFP USB-C port

The FPC connector provides access to two more USB host ports, Fast
Ethernet, some GPIOs, Audio Line out and the IR receiver pin.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20231020145706.705420-3-andre.przywara@arm.com


Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>