[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-footbridge/dma.c b/arch/arm/mach-footbridge/dma.c
index 1f9b09b..b653e9c 100644
--- a/arch/arm/mach-footbridge/dma.c
+++ b/arch/arm/mach-footbridge/dma.c
@@ -11,9 +11,9 @@
  *			ISA DMA controllers.
  */
 #include <linux/init.h>
+#include <linux/io.h>
 
 #include <asm/dma.h>
-#include <asm/io.h>
 #include <asm/scatterlist.h>
 
 #include <asm/mach/dma.h>