dt-bindings: iio: imu: st_lsm6dsx: add LSM6DSO device bindings

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

@@ -7,6 +7,7 @@ Required properties:
   "st,lsm6dsl"
   "st,lsm6dsm"
   "st,ism330dlc"
+  "st,lsm6dso"
 - reg: i2c address of the sensor / spi cs line
 
 Optional properties: