mac80211: 802.11w - Use BIP (AES-128-CMAC)

Add mechanism for managing BIP keys (IGTK) and integrate BIP into the
TX/RX paths.

Signed-off-by: Jouni Malinen <j@w1.fi>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath5k/pcu.c b/drivers/net/wireless/ath5k/pcu.c
index 5b416ed..e758b70 100644
--- a/drivers/net/wireless/ath5k/pcu.c
+++ b/drivers/net/wireless/ath5k/pcu.c
@@ -1026,6 +1026,9 @@
 			return AR5K_KEYTABLE_TYPE_40;
 		else if (key->keylen == LEN_WEP104)
 			return AR5K_KEYTABLE_TYPE_104;
+		return -EINVAL;
+	default:
+		return -EINVAL;
 	}
 	return -EINVAL;
 }