From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 27 May 2013 21:50:04 +1000

It would be handy to be able to just do something like

	of_set_property(node, name, ptr, len);

However, that wouldn't help much with the allocation/leak problem,
though at least it would be easier to use. It could also *try* to re-use
the current allocation if the new content is of smaller or equal size.

And this is so much better of an interface because it allows the
OF implementation to decide how to deal with memory allocation
and freeing.