dt-bindings: iio: imu: st_lsm6dsx: add asm330lhhx device bindings

Add device bindings for asm330lhhx IMU sensor.
Use lsm6dsr as fallback device for asm330lhhx since it implements all
the features currently supported by asm330lhhx.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/2e5304b7e11085d4e701b4b591fd79cc54f01301.1649100168.git.lorenzo@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

@@ -14,7 +14,8 @@ description:
 
 properties:
   compatible:
-    enum:
+    oneOf:
+      - enum:
           - st,lsm6ds3
           - st,lsm6ds3h
           - st,lsm6dsl
@@ -31,6 +32,9 @@ properties:
           - st,lsm6dsrx
           - st,lsm6dst
           - st,lsm6dsop
+      - items:
+          - const: st,asm330lhhx
+          - const: st,lsm6dsr
 
   reg:
     maxItems: 1