of: address: Add kunit test for __of_address_resource_bounds()

The overflow checking has to deal with different datatypes and
edgecases. Add a new kunit testcase to make sure it works correctly.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://lore.kernel.org/r/20250129-of-address-overflow-v3-1-95d1760ed791@linutronix.de


Signed-off-by: Rob Herring (Arm) <robh@kernel.org>