ASoC: cs42l42: Remove power if the driver is being removed

Ensure the power supplies are turned off when removing the driver

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210306185553.62053-7-tanureal@opensource.cirrus.com


Signed-off-by: Mark Brown <broonie@kernel.org>