ref: a6a1806c17c6dbb6c657ac676fc97fd6c5207da7
parent: 19a883ce7a8b0d1f57a1df68947af2bfa7ea5576
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Wed Jul 17 06:30:06 EDT 2019
usbxhci: implement portable dma flush operations and move to port/