dt-bindings: iio: accel: add LIS2DW12 sensor device binding

Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@st.com>
Acked-by: NRob Herring <robh@kernel.org>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/st-sensors.txt

@@ -46,6 +46,7 @@ Accelerometers:
 - st,h3lis331dl-accel
 - st,lng2dm-accel
 - st,lis3l02dq
+- st,lis2dw12
 
 Gyroscopes:
 - st,l3g4200d-gyro