iio: hid-sensor-als: Add light chromaticity support

On some platforms, ambient color sensors also support the x and y light
colors, which represent the coordinates on the CIE 1931 chromaticity
diagram. Add light chromaticity x and y.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20240205185926.3030521-5-srinivas.pandruvada@linux.intel.com


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