ARM: orion5x: add linux,stdout-path to edmini_v2

This commit adds the new linux,stdout-path to the edmini_v2 platform,
pointing to the serial device use for the console.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1398202002-28530-17-git-send-email-thomas.petazzoni@free-electrons.com


Signed-off-by: Jason Cooper <jason@lakedaemon.net>