skbuff: Grammar s/are can/can/, s/change/changes/

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -1406,8 +1406,7 @@ static inline struct sk_buff *skb_get(struct sk_buff *skb)
 }
 
 /*
- * If users == 1, we are the only owner and are can avoid redundant
- * atomic change.
+ * If users == 1, we are the only owner and can avoid redundant atomic changes.
  */
 
 /**