dts: bindings: adc: add io-channel-cells property to ti,ads1119

Added io-channel-cells to the binding as is standard for
the ads1x1x binding. Additionally, this prevents an issue where
you cannot compile due to the length of this property being
longer than expected.

Signed-off-by: Connor Weekes <[email protected]>

Author: conweek

dts/bindings/adc/ti,ads1119.yaml

@@ -7,6 +7,9 @@ compatible: "ti,ads1119"
 
 include: [adc-controller.yaml, i2c-device.yaml]
 
+io-channel-cells:
+  - input
+
 properties:
   "#io-channel-cells":
     const: 1