ARM: mvebu: Enable the network controller in Armada 375 DB board

This commit enables the network controller in the Armada 375 DB board,
and configures the two available ethernet interfaces.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Link: https://lkml.kernel.org/r/1405021936-28658-4-git-send-email-ezequiel.garcia@free-electrons.com


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