[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-omap/usb.c b/arch/arm/plat-omap/usb.c
index 777485e..67ca1e2 100644
--- a/arch/arm/plat-omap/usb.c
+++ b/arch/arm/plat-omap/usb.c
@@ -27,8 +27,8 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/usb/otg.h>
+#include <linux/io.h>
 
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/system.h>
 #include <mach/hardware.h>