ARM: davinci: da850: move interrupt-parent property to soc node

This patch moves 'interrupt-parent' property to soc node, so that
the child inherits this property. This avoids adding 'interrupt-parent'
property to each node.
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Heiko Schocher <hs@denx.de>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/boot/dts/da850.dtsi

@@ -28,6 +28,7 @@ soc {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0x01c00000 0x400000>;
+		interrupt-parent = <&intc>;
 
 		pmx_core: pinmux@1c14120 {
 			compatible = "pinctrl-single";
@@ -62,7 +63,6 @@ serial0: serial@1c42000 {
 			clock-frequency = <150000000>;
 			reg-shift = <2>;
 			interrupts = <25>;
-			interrupt-parent = <&intc>;
 			status = "disabled";
 		};
 		serial1: serial@1d0c000 {
@@ -71,7 +71,6 @@ serial1: serial@1d0c000 {
 			clock-frequency = <150000000>;
 			reg-shift = <2>;
 			interrupts = <53>;
-			interrupt-parent = <&intc>;
 			status = "disabled";
 		};
 		serial2: serial@1d0d000 {
@@ -80,7 +79,6 @@ serial2: serial@1d0d000 {
 			clock-frequency = <150000000>;
 			reg-shift = <2>;
 			interrupts = <61>;
-			interrupt-parent = <&intc>;
 			status = "disabled";
 		};
 	};