ARM: imx27: Use 'AITC' for the interrupt controller name

On the MX27 Reference Manual the interrupt controller is named AITC:
ARM926EJ-S Interrupt Controller

So use the AITC term instead of AVIC.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Origin: id:1334193132-18944-2-git-send-email-festevam@gmail.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx27.dtsi

@@ -32,8 +32,8 @@ aliases {
 		spi2 = &cspi3;
 	};
 
-	avic: avic-interrupt-controller@e0000000 {
-		compatible = "fsl,imx27-avic", "fsl,avic";
+	aitc: aitc-interrupt-controller@e0000000 {
+		compatible = "fsl,imx27-aitc", "fsl,avic";
 		interrupt-controller;
 		#interrupt-cells = <1>;
 		reg = <0x10040000 0x1000>;
@@ -53,7 +53,7 @@ soc {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "simple-bus";
-		interrupt-parent = <&avic>;
+		interrupt-parent = <&aitc>;
 		ranges;
 
 		aipi@10000000 { /* AIPI1 */