net: dsa: mv88e6xxx: Fix binding documentation for MDIO busses

The MDIO busses are switch properties and so should be inside the
switch node. Fix the examples in the binding document.
Reported-by: 尤晓杰 <yxj790222@163.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Fixes: a3c53be5 ("net: dsa: mv88e6xxx: Support multiple MDIO busses")
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/dsa/marvell.txt

@@ -50,7 +50,7 @@ Example:
 			compatible = "marvell,mv88e6085";
 			reg = <0>;
 			reset-gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
-		};
+
 			mdio {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -61,6 +61,7 @@ Example:
 				};
 			};
 		};
+	};
 
 	mdio {
 		#address-cells = <1>;
@@ -74,7 +75,7 @@ Example:
 			compatible = "marvell,mv88e6390";
 			reg = <0>;
 			reset-gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
-		};
+
 			mdio {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -94,3 +95,4 @@ Example:
 				};
 			};
 		};
+	};