arm64: dts: allwinner: Add OrangePi Zero 2 .dts The OrangePi Zero 2 is a development board with the new H616 SoC. It features the usual connectors used on those small boards, and comes with the AXP305, which seems to be compatible with the AXP805. For more details see: http://linux-sunxi.org/Xunlong_Orange_Pi_Zero2 Signed-off-by: Andre Przywara <andre.przywara@arm.com>