The SoC R40 AHCI controller need a regulator to work.
So this patch add a way to add an optional regulator on AHCI controller.
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NCorentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>