dt-bindings: iio: kionix,kxcjk1013: driver support interrupts

Device has interrupts support, which description was missing in the bindings.
Signed-off-by: David Heidelberg <david@ixit.cz>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210919203656.119742-1-david@ixit.czSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/accel/kionix,kxcjk1013.yaml

@@ -21,6 +21,9 @@ properties:
   reg:
     maxItems: 1
 
+  interrupts:
+    maxItems: 1
+
   vdd-supply: true
   vddio-supply: true