Pull up following revision(s) (requested by mrg in ticket #1377):

sys/dev/usb/xhci.c: revision 1.113
sys/dev/usb/xhci.c: revision 1.109

match xhci version 3.10.  allows properly finding all the USB
busses on new ryzen 3 based systems.

unfortunately, the USB busses are still non-functional.

-

fix ryzen usb issue: we set TD size to '1', where has xhci spec 4.11.2.4
says final TRB for a TD should have this set to '0'.  since we currently
only generate sinel TRB TDs, set this to 0.

XXX: pullup-all
from sc.dying

(martin)