[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-pnx4008/dma.c b/arch/arm/mach-pnx4008/dma.c
index 833c56b..ac2f70e 100644
--- a/arch/arm/mach-pnx4008/dma.c
+++ b/arch/arm/mach-pnx4008/dma.c
@@ -21,12 +21,12 @@
 #include <linux/err.h>
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
+#include <linux/io.h>
 
 #include <asm/system.h>
 #include <mach/hardware.h>
 #include <asm/dma.h>
 #include <asm/dma-mapping.h>
-#include <asm/io.h>
 #include <asm/mach/dma.h>
 #include <mach/clock.h>