dt-bindings: input: dlg,da9062-onkey: Allow wakeup-source property

From: Frank Li <[email protected]>

Allow wakeup-source property to fix below CHECK_DTBS warnings:
arch/arm/boot/dts/nxp/imx/imx6dl-emcon-avari.dtb: onkey (dlg,da9063-onkey): 'wakeup-source' does not match any of the regexes: 'pinctrl-[0-9]+'

---
change in v2
- collect Rob acked tags,
https://lore.kernel.org/imx/[email protected]/
- update subject. although git log --oneline show mfd, but it belongs to input subsystem.

---
 Documentation/devicetree/bindings/input/dlg,da9062-onkey.yaml | 2 ++
 1 file changed, 2 insertions(+)

index 1480d95421e18..29ff8fc0d02ec 100644
@@ -32,6 +32,8 @@ properties:
       the OnKey driver will remove support for the KEY_POWER key press
       when triggered using a long press of the OnKey.
 
+  wakeup-source: true
+
 required:
   - compatible
 

2.43.0

Applied, thank you.

Dmitry