Wi-Sun Border router DHCPV server SLAAC mode enabled by default.

Change-Id: Ie7ca9a6cd264b3cec813430186778c1d2349593f

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bbr_api.c

@@ -318,8 +318,8 @@ static void ws_bbr_dhcp_server_start(protocol_interface_info_entry_t *cur, uint8
         return;
     }
     DHCPv6_server_service_callback_set(cur->id, global_id, NULL, wisun_dhcp_address_add_cb);
-
-    DHCPv6_server_service_set_address_autonous_flag(cur->id, global_id, false, false);
+    //Enable SLAAC mode to border router
+    DHCPv6_server_service_set_address_autonous_flag(cur->id, global_id, true, false);
     DHCPv6_server_service_set_address_validlifetime(cur->id, global_id, WS_DHCP_ADDRESS_LIFETIME);
 
     ws_dhcp_client_address_request(cur, global_id, ll);