of/resolver: Switch to new local fixups format.

of/resolver: Switch to new local fixups format.

The original resolver format is way too cryptic, switch
to using a tree based format that gets rid of repetitions,
is more compact and readable.

At the same time, update the selftests to using the new local fixups
format.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[grant.likely: Squashed in testcase changes and merged similar functions]
Signed-off-by: Grant Likely <grant.likely@linaro.org>
(cherry picked from commit da56d04c806a3e9986c66a061d7363ca3157c37b)
Signed-off-by: Mark Brown <broonie@kernel.org>
Conflicts:
	drivers/of/unittest-data/testcases.dts