omap: add profile for BeagleBoard

original BeagleBoard has no Ethernet
provide a profile with all available USB Ethernet adapters
EBVBeagle comes with a kmod-usb-net-mcs7830 compatible device

tested with BeagleBoard C4

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>

SVN-Revision: 45237