NS9750 DevBoard added

* Patch by Pierre AUBERT, 24 Feb 2004
  add USB support for MPC5200

* Patch by Steven Scholz, 24 Feb 2004:
  - fix MII commands to use values from last command

* Patch by Torsten Demke, 24 Feb 2004:
  Add support for the eXalion platform (SPSW-8240, F-30, F-300)