drivers: sensor: Change vendor prefix from 'ltr' to 'liteon'

The vendor prefix has been changed from 'ltr' to 'liteon'.
This change is made to better reflect the actual name of
the vendor, which is LiteOn. The previous prefix 'ltr'
was referring to the LiteOn Optical Sensor family, which
could lead to misunderstandings.

Signed-off-by: Konrad Sikora <kontakt@konradsikora.pl>