[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/plat-mxc/irq.c b/arch/arm/plat-mxc/irq.c
index 1053b66..c6b8378 100644
--- a/arch/arm/plat-mxc/irq.c
+++ b/arch/arm/plat-mxc/irq.c
@@ -18,7 +18,7 @@
  */
 
 #include <linux/irq.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <mach/common.h>
 
 #define AVIC_BASE		IO_ADDRESS(AVIC_BASE_ADDR)