ASIX USB to Ethernet

[jwillis84]

All bugs I am aware of have been fixed.

If you clone the github project

# git clone -b usb-net-drivers https://github.com/johntwillis/ipxe

Change to ipxe and type 'make' it will proceed to build the default ipxe images.

I used the bin/ipxe.iso image to successfully boot from a USB ASIX Adapter, obtain a dhcp address and download itest.ipxe script file and used that to download a tomrtbt kernel and initrd and then booted from that.

Any further work will be to support more hardware; USB host controller types and USB devices.