ARM: sun6i: Fix OHCI2 node name

The unit-address doesn't match the reg property. Since the reg property is
correct, change the unit-address accordingly.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun6i-a31.dtsi

@@ -410,7 +410,7 @@ ohci1: usb@01c1b400 {
 			status = "disabled";
 		};
 
-		ohci2: usb@01c1c000 {
+		ohci2: usb@01c1c400 {
 			compatible = "allwinner,sun6i-a31-ohci", "generic-ohci";
 			reg = <0x01c1c400 0x100>;
 			interrupts = <0 77 4>;