usb-ehci: Clear the portstatus powner bit on device disconnect According to the EHCI spec port ownership should revert to the EHCI controller on device disconnect. This fixes the problem of a port getting stuck on USB 1 when using redirection and plugging in a USB 2 device after a USB 1 device has been redirected. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>