usb: Pass device instead of portnr to usb_legacy_port_reset

Pass the usb_device instead of the portnr to usb_legacy_port_reset and
rename it to usb_hub_port_reset as there is nothing legacy about it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>