ARM: dts: keystone-k2g: Fix unit-address formatting for serial nodes

The unit addresses on couple of serial nodes have a leading 0 resulting
in couple of warning messages around simple-bus unit address format
errors when compiled with W=1. Fix the same.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

arch/arm/boot/dts/keystone-k2g.dtsi

@@ -151,7 +151,7 @@ uart0: serial@2530c00 {
 			status = "disabled";
 		};
 
-		uart1: serial@02531000 {
+		uart1: serial@2531000 {
 			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;
@@ -163,7 +163,7 @@ uart1: serial@02531000 {
 			status = "disabled";
 		};
 
-		uart2: serial@02531400 {
+		uart2: serial@2531400 {
 			compatible = "ti,da830-uart", "ns16550a";
 			current-speed = <115200>;
 			reg-shift = <2>;