Remove prefetch() from <linux/skbuff.h> and "netlabel_addrlist.h"

Commit e66eed651f ("list: remove prefetching from regular list
iterators") removed the include of prefetch.h from list.h.  The skbuff
list traversal still had them.

Quoth David Miller:
  "Please just remove the prefetches.

  Those are modelled after list.h as I intend to eventually convert
  SKB list handling to "struct list_head" but we're not there yet.

  Therefore if we kill prefetches from list.h we should kill it from
  these things in skbuff.h too."

Requested-by: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/netlabel/netlabel_addrlist.h

@@ -96,12 +96,12 @@ static inline struct netlbl_af4list *__af4list_valid_rcu(struct list_head *s,
 
 #define netlbl_af4list_foreach(iter, head)				\
 	for (iter = __af4list_valid((head)->next, head);		\
-	     prefetch(iter->list.next), &iter->list != (head);		\
+	     &iter->list != (head);					\
 	     iter = __af4list_valid(iter->list.next, head))
 
 #define netlbl_af4list_foreach_rcu(iter, head)				\
 	for (iter = __af4list_valid_rcu((head)->next, head);		\
-	     prefetch(iter->list.next),	&iter->list != (head);		\
+	     &iter->list != (head);					\
 	     iter = __af4list_valid_rcu(iter->list.next, head))
 
 #define netlbl_af4list_foreach_safe(iter, tmp, head)			\
@@ -163,12 +163,12 @@ static inline struct netlbl_af6list *__af6list_valid_rcu(struct list_head *s,
 
 #define netlbl_af6list_foreach(iter, head)				\
 	for (iter = __af6list_valid((head)->next, head);		\
-	     prefetch(iter->list.next),	&iter->list != (head);		\
+	     &iter->list != (head);					\
 	     iter = __af6list_valid(iter->list.next, head))
 
 #define netlbl_af6list_foreach_rcu(iter, head)				\
 	for (iter = __af6list_valid_rcu((head)->next, head);		\
-	     prefetch(iter->list.next),	&iter->list != (head);		\
+	     &iter->list != (head);					\
 	     iter = __af6list_valid_rcu(iter->list.next, head))
 
 #define netlbl_af6list_foreach_safe(iter, tmp, head)			\