Avoid use of a shadowed local variable

The same len variable can be used for both needs within
ieee802_1x_get_keys() to avoid compiler warning about use of shadowed
variable.

Fixes: 0ee6885dae ("macsec: Store EAP-Key-Name as eapSessionId")
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

src/ap/ieee802_1x.c

@@ -1426,7 +1426,7 @@ static void ieee802_1x_get_keys(struct hostapd_data *hapd,
 				      shared_secret_len);
 
 	if (keys && keys->send && keys->recv) {
-		size_t len = keys->send_len + keys->recv_len;
+		len = keys->send_len + keys->recv_len;
 		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
 				keys->send, keys->send_len);
 		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",