regulator: maxim,max8973: Document interrupts property

One of the examples in the bindings has an interrupts property and the
Linux kernel driver has support for requesting an interrupt as well. It
looks like the absence from the bindings was just an oversight. Add the
property to make sure the examples can be validated.

Signed-off-by: Thierry Reding <[email protected]>
Acked-by: Rob Herring <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: thierryreding

Documentation/devicetree/bindings/regulator/maxim,max8973.yaml

@@ -86,6 +86,9 @@ properties:
   reg:
     maxItems: 1
 
+  interrupts:
+    maxItems: 1
+
 required:
   - compatible
   - reg