Due to some changes in the framework a resource size of zero does not map
anything at all and it does it silently.
Defining the resource size for the MCI interface make it work again on the
Chumby.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>