dt-bindings: iio: imu: st_lsm6dsx: add asm330lhhxg1

Add device bindings for asm330lhhxg1 IMU sensor.
The lsm6dsr supports the features and functionality provided by
the asm330lhhxg1 via identical interfaces and so is a suitable
fallback compatible.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/942452ec9626bc1166501cec0fa88c369e28ec6f.1706961432.git.lorenzo@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/imu/st,lsm6dsx.yaml

@@ -35,7 +35,9 @@ properties:
           - st,lsm6dsv
           - st,lsm6dso16is
       - items:
-          - const: st,asm330lhhx
+          - enum:
+              - st,asm330lhhx
+              - st,asm330lhhxg1
           - const: st,lsm6dsr
       - items:
           - const: st,lsm6dstx