[WATCHDOG] pcwd-watchdog.txt-patch

Fix example program in pcwd-watchdog.txt document.

Documentation/watchdog/pcwd-watchdog.txt

@@ -35,7 +35,8 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
-#include <linux/pcwd.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
 
 int fd;