Commit 746c9e9f "of/base: Fix PowerPC address parsing hack" limited
the applicability of the workaround whereby a missing ranges is treated
as an empty ranges.  This workaround was hiding a bug in the etsec2
device tree nodes, which have children with reg, but did not have
ranges.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Reported-by: NAlexander Graf <agraf@suse.de>

Introduce some common components that we can utilize to build up the
various PQ3/85xx device trees.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>