mac802154: llsec: correctly lookup implicit-indexed keys

Key id comparison for type 1 keys (implicit source, with index) should
return true if mode and id are equal, not false.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mac802154/llsec.c

@@ -207,6 +207,8 @@ static bool llsec_key_id_equal(const struct ieee802154_llsec_key_id *a,
 		return false;
 
 	switch (a->mode) {
+	case IEEE802154_SCF_KEY_INDEX:
+		return true;
 	case IEEE802154_SCF_KEY_SHORT_INDEX:
 		return a->short_source == b->short_source;
 	case IEEE802154_SCF_KEY_HW_INDEX: