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: Alexander Gordeev <[email protected]>
Acked-by: Rodolfo Giometti <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c
index 1aa02db..55f3961 100644
--- a/drivers/pps/kapi.c
+++ b/drivers/pps/kapi.c
@@ -324,7 +324,7 @@
 		captured = ~0;
 	}
 
-	/* Wake up iif captured somthing */
+	/* Wake up if captured something */
 	if (captured) {
 		pps->go = ~0;
 		wake_up_interruptible(&pps->queue);