OMAP3 beagle Add usbtty configuration

The primary console of beagle is the serial header.

A secondary console is to use the usbtty.  The user can set this
manually by doing

setenv stdout usbtty; setenv stdin usbtty; setenv stderr usbtty
saveenv

usbtty will be usable by accessing the /dev/ttyACM0 on a linux host.

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
1 file changed