wlan: Add SNR monitoring support

Add support to retrieve SNR from the received frame
and return it to the user space.

CRs-Fixed: 529156
Change-Id: Ic63c41e6bc2d9402dc42554e96637dd829a59a53
diff --git a/CORE/HDD/inc/wlan_hdd_main.h b/CORE/HDD/inc/wlan_hdd_main.h
index 88a7e41..a533b29 100644
--- a/CORE/HDD/inc/wlan_hdd_main.h
+++ b/CORE/HDD/inc/wlan_hdd_main.h
@@ -800,6 +800,9 @@
 #endif
    
    v_S7_t rssi;
+
+   tANI_U8 snr;
+
    struct work_struct  monTxWorkQueue;
    struct sk_buff *skb_to_tx;
 
@@ -818,6 +821,7 @@
    //Magic cookie for adapter sanity verification
    v_U32_t magic;
    v_BOOL_t higherDtimTransition;
+   v_BOOL_t survey_idx;
 };
 
 #define WLAN_HDD_GET_STATION_CTX_PTR(pAdapter) (&(pAdapter)->sessionCtx.station)