ARM: orion5x: update intc device tree node to new reg layout

Future irqchip driver for Orion SoCs has a modified reg layout starting
from CAUSE register. The former DT irq driver stub just used what the
non-DT driver wants. Currently, orion5x is not ready for irqchip driver
because of legacy timer and missing DT clk provider. To ease future
conversion and just because orion-intc binding documentation already
reflects new reg layout, we convert orion5x DT now.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/orion5x.dtsi

@@ -16,11 +16,12 @@ / {
 	aliases {
 		gpio0 = &gpio0;
 	};
+
 	intc: interrupt-controller {
-		compatible = "marvell,orion-intc", "marvell,intc";
+		compatible = "marvell,orion-intc";
 		interrupt-controller;
 		#interrupt-cells = <1>;
-		reg = <0xf1020204 0x04>;
+		reg = <0xf1020200 0x08>;
 	};
 
 	ocp@f1000000 {