sctp: cleanup

No functional change intended.

MFC after:	3 days

sys/netinet/sctp_pcb.c

@@ -192,21 +192,17 @@ sctp_find_ifn(void *ifn, uint32_t ifn_index)
 	struct sctp_ifn *sctp_ifnp;
 	struct sctp_ifnlist *hash_ifn_head;
 
-	/*
-	 * We assume the lock is held for the addresses if that's wrong
-	 * problems could occur :-)
-	 */
 	SCTP_IPI_ADDR_LOCK_ASSERT();
 	hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 	LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 		if (sctp_ifnp->ifn_index == ifn_index) {
-			return (sctp_ifnp);
+			break;
 		}
-		if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
-			return (sctp_ifnp);
+		if (ifn != NULL && sctp_ifnp->ifn_p == ifn) {
+			break;
 		}
 	}
-	return (NULL);
+	return (sctp_ifnp);
 }
 
 struct sctp_vrf *