Add the IIO_MOD_LIGHT_UVA and IIO_MOD_LIGHT_UVB modifiers that will be introduced in Linux v6.8.
Note that Linux v6.8-rc1 added those entries in the middle of the iio_modifier enum (which is wrong as it breaks ABI), but it will be fixed for the regular v6.8 release.
Add the IIO_MOD_LIGHT_UVA and IIO_MOD_LIGHT_UVB modifiers that will be introduced in Linux v6.8.
Note that Linux v6.8-rc1 added those entries in the middle of the iio_modifier enum (which is wrong as it breaks ABI), but it will be fixed for the regular v6.8 release.
Fixes #1130.