ARM: dts: omap3: Remove needless interrupt-parent property

All nodes inhert "interrupt-parent" property from root
node. Removed the aforementioned property from usbhsohci,
usbhsehci, ssi_port1, ssi_port2 nodes to avoid duplication.
Signed-off-by: Karthik Tummala <karthik@techveda.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3.dtsi

@@ -713,14 +713,12 @@ usbhshost: usbhshost@48064000 {
 			usbhsohci: ohci@48064400 {
 				compatible = "ti,ohci-omap3";
 				reg = <0x48064400 0x400>;
-				interrupt-parent = <&intc>;
 				interrupts = <76>;
 			};
 
 			usbhsehci: ehci@48064800 {
 				compatible = "ti,ehci-omap";
 				reg = <0x48064800 0x400>;
-				interrupt-parent = <&intc>;
 				interrupts = <77>;
 			};
 		};
@@ -831,7 +829,6 @@ ssi_port1: ssi-port@4805a000 {
 				reg-names = "tx",
 					    "rx";
 
-				interrupt-parent = <&intc>;
 				interrupts = <67>,
 					     <68>;
 			};
@@ -844,7 +841,6 @@ ssi_port2: ssi-port@4805b000 {
 				reg-names = "tx",
 					    "rx";
 
-				interrupt-parent = <&intc>;
 				interrupts = <69>,
 					     <70>;
 			};