BeagleBaordPkg: Removed out of date comment in FDF file about USB stack

The USB stack has been fixed last year (cache coherencey issue in DmaLib).
USB stack has been tested on BeagleBoard-xm with rev 12923 (10/01/2012).



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12924 6f19259b-4bc3-4df7-8a09-765794883524
1 file changed