USB mass storage device driver initial implementation ...

Implemented an initial version of USB mass storage device driver,
supporting USB mass storage devices with SCSI interface and BBB
protocol.  It implements the ATA interface and registers diskovered
LUNs with the disk driver.

remove unported includes and drivers

* Code cleanup: ...

- remove trailing white space, trailing empty lines, C++ comments, etc.
  - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)

* Patches by Kenneth Johansson, 25 Jun 2003:
  - major rework of command structure
    (work done mostly by Michal Cendrowski and Joakim Kristiansen)

Initial revision