dt-bindings: iio: potentiometer: Add AD5110 in trivial-devices

Add AD5110, a Nonvolatile Digital Potentiometer into
trivial-devices.yaml.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mugilraj Dhavachelvan <dmugil2000@gmail.com>
Link: https://lore.kernel.org/r/20210814175607.48399-2-dmugil2000@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -33,6 +33,8 @@ properties:
           - ad,ad7414
             # ADM9240:  Complete System Hardware Monitor for uProcessor-Based Systems
           - ad,adm9240
+            # AD5110 - Nonvolatile Digital Potentiometer
+          - adi,ad5110
             # Analog Devices ADP5585 Keypad Decoder and I/O Expansion
           - adi,adp5585
             # Analog Devices ADP5585 Keypad Decoder and I/O Expansion with support for Row5