[MiNT] USB Ethernet support

[Alan Hourihane <alanh@fairlite.co.uk>]

Hi all,

Just committed my work for USB ethernet support.

It currently supports the ASIX chipsets. I've been using a DLINK 
DUB-E100 Rev B1, although
there are some others listed in the driver that could be used.

You need the ETH.UDD module installed in the USB/ directory with your 
STORAGE.UDD, and USBXXX.KM as well as UNICORN.UCD.

Then the ASIX.XIF is installed alongside other XIF's in the normal MINT 
directory. You should ensure you install a new INET4.XDD as well.

After bootup you should get a new 'asx0' device that can be configured 
as usual with ifconfig/route.

Enjoy folks !

Alan.