of: unittest: Add tests for address translations

Add tests to exercise address translations based on ranges properties.

Tests added cover "default" (2cell) address translations, "default
flags" (3cell) address translations and PCI address translations.
They also cover PCI BAR translations introduced in commit 407d1a51


("PCI: Create device tree node for bridge").

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/r/20231017110221.189299-4-herve.codina@bootlin.com
Signed-off-by: Rob Herring <robh@kernel.org>