[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-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 443d07f..6b7d672 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -25,10 +25,11 @@
  */
 #include <linux/module.h>
 #include <linux/init.h>
-#include <asm/system.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <linux/spinlock.h>
 
+#include <asm/system.h>
+
 #include <mach/control.h>
 #include <mach/mux.h>