sunxi-usbc0: Properly power up vbus from pin_init when the gpio is inverted

The Auxtek-t003 has an inverted vbus gpio control. sw_hcd_board_set_vbus deals
properly with this, but pin_init does not, this fixes this.

While at it also fix the currently unused code path for using gpio's on the
axp pmic for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi-usbc0: Properly intialize hcd0 when running in host-only mode

Signed-off-by: Hans de Goede <hdegoede@redhat.com>