ARM: imx3: Retrieve the AVIC base address from devicetree

Now that imx31 and imx35 has been converted to a devicetree-only platform,
retrieve the AVIC base address from devicetree.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/mach-imx/mm-imx3.c

@@ -112,7 +112,14 @@ void __init imx31_init_early(void)
 
 void __init mx31_init_irq(void)
 {
-	mxc_init_irq(MX31_IO_ADDRESS(MX31_AVIC_BASE_ADDR));
+	void __iomem *avic_base;
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx31-avic");
+	avic_base = of_iomap(np, 0);
+	BUG_ON(!avic_base);
+
+	mxc_init_irq(avic_base);
 }
 #endif /* ifdef CONFIG_SOC_IMX31 */
 
@@ -154,6 +161,13 @@ void __init imx35_init_early(void)
 
 void __init mx35_init_irq(void)
 {
-	mxc_init_irq(MX35_IO_ADDRESS(MX35_AVIC_BASE_ADDR));
+	void __iomem *avic_base;
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx35-avic");
+	avic_base = of_iomap(np, 0);
+	BUG_ON(!avic_base);
+
+	mxc_init_irq(avic_base);
 }
 #endif /* ifdef CONFIG_SOC_IMX35 */