Hans Petter Selasky 0a4cc48fe5 Add support for Multi-TT mode of modern USB HUBs.
This will give you more bandwidth for isochronous
FULL speed applications connected through a
High Speed HUB.

This patch has been tested with XHCI and EHCI.

MFC after:	1 week
2012-04-29 17:12:33 +00:00
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