sensor: ltrf215a: LiteOn LTR-F216A

New driver for I2C illuminance sensor LiteOn LTR-F216A.

Datasheet:
https://optoelectronics.liteon.com/upload/download/DS86-2019-0016/LTR-F216A_Final_DS_V1.4.PDF



* Applied suggestions from code review
* Removed retry mechanism

Signed-off-by: Markus Becker <markus.becker@tridonic.com>
Co-authored-by: Andy Sinclair <andy@aasinclair.co.uk>