mac802154: add llsec encryption method

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac802154/llsec.h b/net/mac802154/llsec.h
index 65c1dd4..083055b 100644
--- a/net/mac802154/llsec.h
+++ b/net/mac802154/llsec.h
@@ -102,4 +102,6 @@
 int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
 				 const struct ieee802154_llsec_seclevel *sl);
 
+int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
+
 #endif /* MAC802154_LLSEC_H */