We'll need to use those helpers from drivers too, so let's move it to a
more visible location.
Reviewed-by: NJavier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20221123-rpi-kunit-tests-v3-1-4615a663a84a@cerno.techSigned-off-by: NMaxime Ripard <maxime@cerno.tech>