usb: xhci: Remove ep_trb from xhci_cleanup_halted_endpoint()

Function argument ep_trb for xhci_cleanup_halted_endpoint() isn't
needed anymore. Cleanup it.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>