[WATCHDOG] linux/watchdog.h include types.h patch

watchdog.h is using __u8 and __u32 from linux/types.h, so it needs to
include it.

include/linux/watchdog.h

@@ -10,6 +10,7 @@
 #define _LINUX_WATCHDOG_H
 
 #include <linux/ioctl.h>
+#include <linux/types.h>
 
 #define	WATCHDOG_IOCTL_BASE	'W'