regulator: Add devm helpers for get and enable

A few regulator consumer drivers seem to be just getting a regulator,
enabling it and registering a devm-action to disable the regulator at
the driver detach and then forget about it.

We can simplify this a bit by adding a devm-helper for this pattern.
Add devm_regulator_get_enable() and devm_regulator_get_enable_optional()

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/ed7b8841193bb9749d426f3cb3b199c9460794cd.1660292316.git.mazziesaccount@gmail.com


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