dt-bindings: usb: dwc3: Allow connector in USB controller node

Allow specifying the connector directly in the USB controller node, as
allow in other USB controller bindings and commonly used for
"gpio-usb-b-connector". Linux already supports this without driver
changes.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250325131848.127438-1-matthias.schiffer@ew.tq-group.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/snps,dwc3-common.yaml

@@ -390,6 +390,12 @@ properties:
     maximum: 8
     default: 1
 
+  connector:
+    $ref: /schemas/connector/usb-connector.yaml#
+    description: Connector for dual role switch
+    type: object
+    unevaluatedProperties: false
+
   port:
     $ref: /schemas/graph.yaml#/properties/port
     description: