pps: trivial fixes

Here are some very trivial fixes combined:

- add macro definitions to protect header file from including several times

- remove declaration for an unexistent array

- fix typos
Signed-off-by: NAlexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: NRodolfo Giometti <giometti@linux.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/pps/kapi.c

@@ -324,7 +324,7 @@ void pps_event(int source, struct pps_ktime *ts, int event, void *data)
 		captured = ~0;
 	}
 
-	/* Wake up iif captured somthing */
+	/* Wake up if captured something */
 	if (captured) {
 		pps->go = ~0;
 		wake_up_interruptible(&pps->queue);

include/linux/pps_kernel.h

@@ -18,6 +18,9 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#ifndef LINUX_PPS_KERNEL_H
+#define LINUX_PPS_KERNEL_H
+
 #include <linux/pps.h>
 
 #include <linux/cdev.h>
@@ -71,7 +74,6 @@ struct pps_device {
 
 extern spinlock_t pps_idr_lock;
 extern struct idr pps_idr;
-extern struct timespec pps_irq_ts[];
 
 extern struct device_attribute pps_attrs[];
 
@@ -87,3 +89,5 @@ extern void pps_unregister_source(int source);
 extern int pps_register_cdev(struct pps_device *pps);
 extern void pps_unregister_cdev(struct pps_device *pps);
 extern void pps_event(int source, struct pps_ktime *ts, int event, void *data);
+
+#endif /* LINUX_PPS_KERNEL_H */