Fixed Asynch request missing msdu_handle set at LLC.

Change-Id: I8bf9ac9a4e08a608350bd9955488017a28b204fb

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_llc_data_service.c

@@ -765,6 +765,7 @@ int8_t ws_llc_asynch_request(struct protocol_interface_info_entry *interface, as
     data_req.SeqNumSuppressed = true;
     data_req.SrcAddrMode = MAC_ADDR_MODE_64_BIT;
     data_req.Key = request->security;
+    data_req.msduHandle = message->msg_handle;
     if (request->message_type == WS_FT_PAN_ADVERT_SOL) {
         // PANID not know yet must be supressed
         data_req.PanIdSuppressed = true;