dt-bindings: usb: cdns,usb3: use common usb-drd yaml

Use common usb-drd yaml for usb OTG related propteries to fix below
DTB_CHECK warning.

arch/arm64/boot/dts/freescale/imx8qxp-mek.dtb: usb@5b110000: usb@5b120000: 'port', 'usb-role-switch' do not match any of the regexes: 'pinctrl-[0-9]+'

Add "port" proptery to use connect type C connector and fix below warning.
arch/arm64/boot/dts/freescale/imx8qxp-mek.dtb: usb@5b110000: usb@5b120000: Unevaluated properties are not allowed ('port' was unexpected)

Signed-off-by: Frank Li <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/cdns,usb3.yaml

···
       - const: otg
       - const: wakeup
 
-  dr_mode:
-    enum: [host, otg, peripheral]
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+    description:
+      This port is used with the 'usb-role-switch' property to connect the
+      cdns3 to type C connector.
 
   maximum-speed:
     enum: [super-speed, high-speed, full-speed]
···
     description: Enable resetting of PHY if Rx fail is detected
     type: boolean
 
+dependencies:
+  port: [ usb-role-switch ]
+
 required:
   - compatible
   - reg
···
   - interrupts
   - interrupt-names
 
-additionalProperties: false
+allOf:
+  - $ref: usb-drd.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |