[usb] USB 2.o PHY update

[Rudolf Usselmann <rudi@asics.ws>]

After some searching on the net, I found out that there is a common
Transceiver (PHY) interface that several companies have agreed to. The
specification is called UTMI.

I have also found a few more announced PHYs.

Below list includes everything I have today about USB 2.0 PHYs.


UTMI Specification
==================
http://developer.intel.com/technology/usb/download/USB_TMI_spec.pdf.


Announced PHY chips
===================

Lucent USS2X1
http://www.lucent.com/micro/usb/usbdocs.html


NEC uPD720120
http://www.necel.com/home.nsf/Main?ReadForm&Multimedia+Products

Philips ISP1501
http://www.semiconductors.philips.com/pip/isp1501-01/


IP Cores
========

INTEL
http://developer.intel.com/technology/usb/download/2_0_Xcvr_Macrocell_1_03.h
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