- removed max_packet_size member from USB device structure
- usb_uhci: improved speed info
- updated USB-related documentation
- TODO: review and test the main part of the xHCI changes by Ben
been ported from QEMU and originally have this license
- TODO: The QEMU people should verify the changes and tell us if something is
missing. Bochs 2.6 will be released after everything has been confirmed to
be okay.