GTK update trigger fix

Earlier if we have over 1 GTK update we only could send 1 on row. Now we remove old one if we try to start same KMP state at PAE authentication.

Change-Id: I879a877d11558761711241f09dbf1f4d1a356fda

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_pae_auth.c

@@ -863,9 +863,15 @@ static void ws_pae_auth_next_kmp_trigger(pae_auth_t *pae_auth, supp_entry_t *sup
         // All done
         return;
     } else {
-        if (ws_pae_lib_kmp_list_type_get(&supp_entry->kmp_list, next_type) != NULL) {
-            tr_info("KMP already ongoing; ignored, eui-64: %s", trace_array(supp_entry->addr.eui_64, 8));
-            return;
+
+        kmp_api_t *api = ws_pae_lib_kmp_list_type_get(&supp_entry->kmp_list, next_type);
+        if (api != NULL) {
+            if (next_type != IEEE_802_11_GKH) {
+                tr_info("KMP already ongoing; ignored, eui-64: %s", trace_array(supp_entry->addr.eui_64, 8));
+                return;
+            }
+            // Delete KMP
+            ws_pae_lib_kmp_list_delete(&supp_entry->kmp_list, api);
         }
     }