ARM: dts: Remove duplicate 'interrput-parent' property for exynos3250

This patch removes duplicat 'interrupt-parent' property for Exynos3250
because exynos3250.dtsi already defined 'interrupt-parent' property
as following:

In arch/arm/boot/dts/exynos3250.dtsi:

	compatible = "samsung,exynos3250";
	interrupt-parent = <&gic>;

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos3250.dtsi

@@ -204,7 +204,6 @@
 
 			wakeup-interrupt-controller {
 				compatible = "samsung,exynos4210-wakeup-eint";
-				interrupt-parent = <&gic>;
 				interrupts = <0 48 0>;
 			};
 		};
@@ -243,7 +242,6 @@
 			compatible = "arm,amba-bus";
 			#address-cells = <1>;
 			#size-cells = <1>;
-			interrupt-parent = <&gic>;
 			ranges;
 
 			pdma0: pdma@12680000 {