arm64: dts: allwinner: a64: Orange Pi Win: Enable USB OTG socket

The Orange Pi Win has a micro USB-B socket, connected to the SoC's
USB-OTG port. Its power is supplied by the AXP PMIC, and the ID pin is
connected to GPIO PH9. It can serve both as a host or a client port.

Add the respective DT nodes to enable it.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
[wens@csie.org: enable paired EHCI/OHCI device nodes and regulator supply]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>