regulator fix for "regulator: core: Add regulator_is_equal() helper"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20200115120258.0e535fcb@canb.auug.org.au


Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>