ARM: orion5x: remove unneeded code for edmini_v2

The edmini_v2 platform is now fully converted to the Device Tree, so
we can get rid of the old style board-file and the related Kconfig
option.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1398202002-28530-34-git-send-email-thomas.petazzoni@free-electrons.com


Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>