ARM: dts: dove: Fix interrupt controller node name

The current ones makes validation unhappy:

dove-d3plug.dt.yaml: main-interrupt-ctrl@20200: $nodename:0:
'main-interrupt-ctrl@20200' does not match
'^interrupt-controller(@[0-9a-f,]+)*$'

Signed-off-by: Lubomir Rintel <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/boot/dts/dove.dtsi

···
 				marvell,#interrupts = <5>;
 			};
 
-			intc: main-interrupt-ctrl@20200 {
+			intc: interrupt-controller@20200 {
 				compatible = "marvell,orion-intc";
 				interrupt-controller;
 				#interrupt-cells = <1>;