dt-bindings: pci: pci-msi: Correct the unit-address of the pci node name

The unit-address must match the first address specified in the
reg property of the node.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/pci-msi.txt

@@ -201,7 +201,7 @@ Example (5)
 		#msi-cells = <1>;
 	};
 
-	pci: pci@c {
+	pci: pci@f {
 		reg = <0xf 0x1>;
 		compatible = "vendor,pcie-root-complex";
 		device_type = "pci";