[ARM] 5606/1: Fix ep93xx watchdog driver headers

Fix a number of build errors in the ep93xx watchdog driver due
to missing io.h

Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/watchdog/ep93xx_wdt.c b/drivers/watchdog/ep93xx_wdt.c
index e9f950f..cdd55e0 100644
--- a/drivers/watchdog/ep93xx_wdt.c
+++ b/drivers/watchdog/ep93xx_wdt.c
@@ -29,6 +29,7 @@
 #include <linux/watchdog.h>
 #include <linux/timer.h>
 #include <linux/uaccess.h>
+#include <linux/io.h>
 #include <mach/hardware.h>
 
 #define WDT_VERSION	"0.3"