dt-bindings: net: qca,ar71xx: remove label = "cpu" from examples

This is not used by the DSA dt-binding, so remove it from the examples.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/qca,ar71xx.yaml

@@ -123,7 +123,6 @@ examples:
 
                     switch_port0: port@0 {
                         reg = <0x0>;
-                        label = "cpu";
                         ethernet = <&eth1>;
 
                         phy-mode = "gmii";