dt-bindings: usb: tps6598x: Add wakeup property

Add wakeup property description. People can enable it with adding
the property.
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230105075058.924680-1-jun.nie@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/ti,tps6598x.yaml

@@ -23,6 +23,8 @@ properties:
   reg:
     maxItems: 1
 
+  wakeup-source: true
+
   interrupts:
     maxItems: 1
 
@@ -48,6 +50,7 @@ examples:
         tps6598x: tps6598x@38 {
             compatible = "ti,tps6598x";
             reg = <0x38>;
+            wakeup-source;
 
             interrupt-parent = <&msmgpio>;
             interrupts = <107 IRQ_TYPE_LEVEL_LOW>;