ARM: dts: at91: sam9x60: Add AIC node

Add Advanced Interrupt Controller node and define it as interrupt
parent in sam9x60 SoC DT.

Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
Reviewed-by: Eugen Hristev <eugen.hristev@linaro.org>

arch/arm/dts/sam9x60.dtsi

@@ -17,6 +17,7 @@
 /{
 	model = "Microchip SAM9X60 SoC";
 	compatible = "microchip,sam9x60";
+	interrupt-parent = <&aic>;
 
 	aliases {
 		serial0 = &dbgu;
@@ -199,6 +200,14 @@
 				reg = <0xffffea00 0x100>;
 			};
 
+			aic: interrupt-controller@fffff100 {
+				compatible = "microchip,sam9x60-aic";
+				#interrupt-cells = <3>;
+				interrupt-controller;
+				reg = <0xfffff100 0x100>;
+				atmel,external-irqs = <31>;
+			};
+
 			dbgu: serial@fffff200 {
 				compatible = "atmel,at91sam9260-dbgu", "atmel,at91sam9260-usart";
 				reg = <0xfffff200 0x200>;