A few managed regulator functions were missing from the API list.

Add missing functions.
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/5efc0c90342b0a0ef3322b8fc1472b84cfc0eb45.1660292316.git.mazziesaccount@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>