Merge pull request #1981 from ARMmbed/iotthd-3111

Path control size from 5->7.

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bbr_api.c

@@ -62,7 +62,7 @@ static rpl_dodag_conf_t rpl_conf = {
     .lifetime_unit = 60,
     .objective_code_point = 1, // MRHOF algorithm used
     .authentication = 0,
-    .path_control_size = 5,
+    .path_control_size = 7,
     .dag_max_rank_increase = 2048,
     .min_hop_rank_increase = 256,
     // DIO configuration