Reported by Nikolaus Schaller, Apr 21, 2010

integrate/rebase on official uBoot as soon as the patches by Khasim 
are approved.

http://groups.google.de/group/beagleboard/browse_thread/thread/f70159
f29b29a68c

manage variants for GTA04E expansion board and real GTA04 board 
(have some differences in initialization, PIN MUX and assignment of 
signals)

add GPS test commands

add whatever we need for nand flashing

add production test mode (make everything blink and do something)