arm: dts: unit address should not have 0x prefix

The implied format for most bus bindings implies the uname-address
part of the unit-name should be in hex without a leading 0x.

Fix the one i2c bus that did not follow this convention.

Signed-off-by: Milton Miller <miltonm@us.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/ast2400.dtsi

@@ -159,7 +159,7 @@
 					interrupts = <4>;
 				};
 
-				i2c5: i2c-bus@0x180 {
+				i2c5: i2c-bus@180 {
 					#address-cells = <1>;
 					#size-cells = <0>;
 					reg = <0x180 0x40>;