[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-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c
index 38260d5..22e0eb6 100644
--- a/arch/arm/mach-ns9xxx/irq.c
+++ b/arch/arm/mach-ns9xxx/irq.c
@@ -10,7 +10,7 @@
  */
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <asm/mach/irq.h>
 #include <mach/regs-sys-common.h>
 #include <mach/irqs.h>