of/selftest: add testcase for nodes with same name and address

Add a test case for nodes which have the same name and same
non-translatable unit address.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Frank Rowand <frank.rowand@sonymobile.com>

diff --cc drivers/of/selftest.c
Simple merge

diff --cc drivers/of/testcase-data/testcases.dtsi
Simple merge

diff --cc drivers/of/testcase-data/tests-platform.dtsi
Simple merge