dt-bindings: rtc: microcrystal,rv3032: Document wakeup-source property

The RV3032 can be used as a wake-up source, document the 'wakeup-source'
property as allowed property.

Signed-off-by: Marek Vasut <[email protected]>
Acked-by: Conor Dooley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Belloni <[email protected]>

Author: Marek Vasut

Documentation/devicetree/bindings/rtc/microcrystal,rv3032.yaml

@@ -38,6 +38,8 @@ properties:
       - 3000
       - 4400
 
+  wakeup-source: true
+
 required:
   - compatible
   - reg