[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-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c
index 89ce60e..d633274 100644
--- a/arch/arm/plat-s3c24xx/cpu.c
+++ b/arch/arm/plat-s3c24xx/cpu.c
@@ -29,10 +29,10 @@
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
+#include <linux/io.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
-#include <asm/io.h>
 #include <asm/delay.h>
 #include <asm/cacheflush.h>