dt-bindings: iio: light: add support for Vishay VEML6075

The Vishay VEML6075 is a 16-bit digital UVA and UVB sensor with I2C
interface.

Add bindings and an example for the Vishay VEML6075.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231110-veml6075-v3-2-6ee46775b422@gmail.com


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