Documentation: dt: iio: imu: st_lsm6dsx: add ism330dlc sensor device binding

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt

@@ -6,6 +6,7 @@ Required properties:
   "st,lsm6ds3h"
   "st,lsm6dsl"
   "st,lsm6dsm"
+  "st,ism330dlc"
 - reg: i2c address of the sensor / spi cs line
 
 Optional properties: