powerpc: dts: acadia: DT fix s/#interrupts-parent/#interrupt-parent/

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/boot/dts/acadia.dts

@@ -183,7 +183,7 @@ ieee1588@ef602800 {
 			usb@ef603000 {
 				compatible = "ohci-be";
 				reg = <0xef603000 0x80>;
-				interrupts-parent = <&UIC0>;
+				interrupt-parent = <&UIC0>;
 				interrupts = <0xd 0x4 0xe 0x4>;
 			};