dt-bindings: iio: st-sensors: Add LSM303C accelerometer+magnetometer

The ST LSM303C [1] is a accelerometer and magnetometer combo sensor
compatible with the existing ST sensor bindings. Accelerometer and
magnetometer are exposed through separate I2C/SPI devices, so document
separate compatibles with -accel and -magn suffix.

[1]: https://www.st.com/resource/en/datasheet/lsm303c.pdfSigned-off-by: Stephan Gerhold <stephan@gerhold.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230106102239.9647-2-stephan@gerhold.netSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/st,st-sensors.yaml

@@ -39,6 +39,7 @@ properties:
           - st,lis3lv02dl-accel
           - st,lng2dm-accel
           - st,lsm303agr-accel
+          - st,lsm303c-accel
           - st,lsm303dl-accel
           - st,lsm303dlh-accel
           - st,lsm303dlhc-accel
@@ -66,6 +67,7 @@ properties:
           - st,lis2mdl
           - st,lis3mdl-magn
           - st,lsm303agr-magn
+          - st,lsm303c-magn
           - st,lsm303dlh-magn
           - st,lsm303dlhc-magn
           - st,lsm303dlm-magn