sctp: remove macros sctp_spin_[un]lock_irqrestore

Redefined spin_[un]lock_irqstore to sctp_spin_[un]lock_irqrestore for user
space friendly code which we haven't use in years, so removing them.
Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sctp/sctp.h

@@ -171,9 +171,6 @@ extern struct kmem_cache *sctp_bucket_cachep __read_mostly;
  */
 
 /* spin lock wrappers. */
-#define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags)
-#define sctp_spin_unlock_irqrestore(lock, flags)  \
-       spin_unlock_irqrestore(lock, flags)
 #define sctp_local_bh_disable() local_bh_disable()
 #define sctp_local_bh_enable()  local_bh_enable()
 #define sctp_spin_lock(lock)    spin_lock(lock)
@@ -353,13 +350,13 @@ static inline void sctp_skb_list_tail(struct sk_buff_head *list,
 {
 	unsigned long flags;
 
-	sctp_spin_lock_irqsave(&head->lock, flags);
+	spin_lock_irqsave(&head->lock, flags);
 	sctp_spin_lock(&list->lock);
 
 	skb_queue_splice_tail_init(list, head);
 
 	sctp_spin_unlock(&list->lock);
-	sctp_spin_unlock_irqrestore(&head->lock, flags);
+	spin_unlock_irqrestore(&head->lock, flags);
 }
 
 /**