regulator: rtq2208: Fix LDO discharge register and add vsel setting

The LDO's Vout is adjustable if the hardware setting allows it,
and it can be set either 1800mv or 3300mv.
Additionally, the discharge register has been moved to another position.

Signed-off-by: Alina Yu <alina_yu@richtek.com>
Link: https://lore.kernel.org/r/5d56b79c94de63fc86b5a70b7e374da4240fee8b.1714467553.git.alina_yu@richtek.com


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