ARM: dts: exynos: Fix DTC unit name warnings in Peach Pit

Fix following DTC warnings in Exynos5420 Peach Pit:

Warning (unit_address_vs_reg): Node /dp-controller@145B0000/ports/port@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /i2c@12CD0000/lvds-bridge@48/ports/port@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /i2c@12CD0000/lvds-bridge@48/ports/port@1 has a unit name, but no reg property
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

arch/arm/boot/dts/exynos5420-peach-pit.dts

@@ -165,7 +165,7 @@ &dp {
 	samsung,hpd-gpio = <&gpx2 6 GPIO_ACTIVE_HIGH>;
 
 	ports {
-		port@0 {
+		port0 {
 			dp_out: endpoint {
 				remote-endpoint = <&bridge_in>;
 			};
@@ -633,13 +633,13 @@ ps8625: lvds-bridge@48 {
 		use-external-pwm;
 
 		ports {
-			port@0 {
+			port0 {
 				bridge_out: endpoint {
 					remote-endpoint = <&panel_in>;
 				};
 			};
 
-			port@1 {
+			port1 {
 				bridge_in: endpoint {
 					remote-endpoint = <&dp_out>;
 				};