iio: temperature: mlx90632 Add supply regulator to sensor

Provide possibility to toggle power supply to the sensor so that user
can optimize their setup and not have the sensor constantly powered.

Signed-off-by: Crt Mori <cmo@melexis.com>
Link: https://lore.kernel.org/r/20220808144908.1559069-1-cmo@melexis.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>