[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/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 76b800a..b480f1d 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -18,9 +18,9 @@
  */
 #include <linux/init.h>
 #include <linux/spinlock.h>
+#include <linux/io.h>
 
 #include <asm/cacheflush.h>
-#include <asm/io.h>
 #include <asm/hardware/cache-l2x0.h>
 
 #define CACHE_LINE_SIZE		32