[NET]: Fix "nocast type" warnings in skbuff.h

From: Victor Fusco <victor@cetuc.puc-rio.br>

Fix the sparse warning "implicit cast to nocast type"
Signed-off-by: NVictor Fusco <victor@cetuc.puc-rio.br>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -502,7 +502,8 @@ static inline struct sk_buff *skb_share_check(struct sk_buff *skb,
  *
  *	%NULL is returned on a memory allocation failure.
  */
-static inline struct sk_buff *skb_unshare(struct sk_buff *skb, int pri)
+static inline struct sk_buff *skb_unshare(struct sk_buff *skb,
+					  unsigned int __nocast pri)
 {
 	might_sleep_if(pri & __GFP_WAIT);
 	if (skb_cloned(skb)) {