before we can only support tftp
so keep it as default

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Also adapt the config file to the default environment.

Signed-off-by: Juergen Beisert <juergen@kreuzholzen.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This work is mainly based on a9m2440 board implementation
from Juergen Beisert <jbe@pengutronix.de>. Functionality
was tested only running barebox from ram. Loading to flash
and booting will not work because missing lowlevel_init
functionality (lack of jtag debugger on my side ;)).

Signed-off-by: Marek Belisko <marek.belisko@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>