wlan: Low Power Heartbeat feature

New customer requirement, Low power heartbeat
FW will handle TCP/UDP level heartbeat failure detection.
Host will send configuration request to FW with parameters.
Host will use TESTMODE as a command path.

Change-Id: I7a0ad93e409fa432c68b9d73aff64b6c3fc13782
CRs-fixed: 518667
diff --git a/CORE/HDD/inc/wlan_hdd_main.h b/CORE/HDD/inc/wlan_hdd_main.h
index 31266f9..bbb151b 100644
--- a/CORE/HDD/inc/wlan_hdd_main.h
+++ b/CORE/HDD/inc/wlan_hdd_main.h
@@ -858,6 +858,15 @@
    v_TIME_t    lastFrameTs;
 }hdd_traffic_monitor_t;
 
+#ifdef FEATURE_WLAN_LPHB
+typedef struct
+{
+   v_U8_t enable;
+   v_U8_t item;
+   v_U8_t session;
+} lphbEnableStruct;
+#endif /* FEATURE_WLAN_LPHB */
+
 /** Adapter stucture definition */
 
 struct hdd_context_s
@@ -1012,6 +1021,9 @@
 
     vos_timer_t hdd_p2p_go_conn_is_in_progress;
 
+#ifdef FEATURE_WLAN_LPHB
+    lphbEnableStruct  lphbEnableReq;
+#endif /* FEATURE_WLAN_LPHB */
 };