dt-bindings: iio: accel: Add docs for ADXL359

Update ADXL355 existing documentation with documentation
for ADXL359 device.
Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221031105129.47740-3-ramona.bolboaca@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/accel/adi,adxl355.yaml

@@ -4,20 +4,22 @@
 $id: http://devicetree.org/schemas/iio/accel/adi,adxl355.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Analog Devices ADXL355 3-Axis, Low noise MEMS Accelerometer
+title: Analog Devices ADXL355 and ADXL359 3-Axis, Low noise MEMS Accelerometers
 
 maintainers:
   - Puranjay Mohan <puranjay12@gmail.com>
 
 description: |
-  Analog Devices ADXL355 3-Axis, Low noise MEMS Accelerometer that supports
-  both I2C & SPI interfaces
+  Analog Devices ADXL355 and ADXL359 3-Axis, Low noise MEMS Accelerometers that
+  support both I2C & SPI interfaces
     https://www.analog.com/en/products/adxl355.html
+    https://www.analog.com/en/products/adxl359.html
 
 properties:
   compatible:
     enum:
       - adi,adxl355
+      - adi,adxl359
 
   reg:
     maxItems: 1