ARM: orion5x: add node labels in Orion5x SoC Device Tree file

In order to ease identification of devices, it is useful to have
Device Tree labels on all devices. This commit adds such labels to the
Orion5x SoC Device Tree file.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1398202002-28530-15-git-send-email-thomas.petazzoni@free-electrons.com


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