dt-bindings: iio: st-sensors: Add LSM303D accelerometer+magnetometer

Same as the lsm9ds0, except that the lsm303d doesn't
feature a gyroscope.
Signed-off-by: Marius Hoch <mail@mariushoch.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Hans de Goede <hansg@kernel.org>
Link: https://lore.kernel.org/r/20230415231130.115094-7-mail@mariushoch.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

@@ -84,6 +84,7 @@ properties:
           - st,lps35hw
       - description: IMUs
         enum:
+          - st,lsm303d-imu
           - st,lsm9ds0-imu
       - description: Deprecated bindings
         enum: