mxs: start a console on USB gadget serial ports
The I2SE Duckbill devices are pen-drive like and thus the usage
of the USB gadget subsystem is highly indicated.
Spawning a console if a serial gadget is configured saves
us from connecting a physical debug uart.
On Olimex OLinuXino Maxi/Mini boards, this does not hurt.
Signed-off-by: Michael Heimpold <[email protected]>
Michael Heimpold