iio: light: Add support for AL3000a illuminance sensor

AL3000a is a simple I2C-based ambient light sensor, which is
closely related to AL3010 and AL3320a, but has significantly
different way of processing data generated by the sensor.

Tested-by: Robert Eckelmann <longnoserob@gmail.com>
Tested-by: Antoni Aloy Torrens <aaloytorrens@gmail.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250217140336.107476-3-clamor95@gmail.com


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