USB Improvements status report 9

[Sylvestre Gallon]

Hi,

Done this week :

- Removed some code from usb_pipe_methods.
- Started the implementation of generic_roothub_exec.
- Changed dci softc field orders and flags field orders to allow
structure aggregation in generic_roothub_exec.

Cheers,

-- 
Sylvestre Gallon (http://devsyl.blogspot.com)
Fifth Grade Student @ Epitech & Researcher @ LSE
R&D @ Rathaxes (http://www.rathaxes.org)