[ARM] Convert asm/io.h to linux/io.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-imx/irq.c b/arch/arm/mach-imx/irq.c
index 798f221..2ce7562 100644
--- a/arch/arm/mach-imx/irq.c
+++ b/arch/arm/mach-imx/irq.c
@@ -26,10 +26,10 @@
 #include <linux/init.h>
 #include <linux/list.h>
 #include <linux/timer.h>
+#include <linux/io.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
-#include <asm/io.h>
 
 #include <asm/mach/irq.h>