arm64: allwinner: a64: enable EHCI0/OHCI0 for Pine64

As we have USB0 controller switch available on A64, we should now enable
the EHCI0/OHCI0 controllers for Pine64.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>