wlan: Add diag event for scan blocked by TDLS.

Add diag event for EVENT_TDLS_SCAN_BLOCK. This event indicates if
scan is blocked because of TDLS.

Change-Id: I00dd9d2a54cbe054b400b2d1cb74c0e14b9a13d7
CRs-Fixed: 934456
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index a5adaea..a116087 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -13213,15 +13213,15 @@
                                           dev,
 #endif
                                           request);
-    if(status <= 0)
+    if (status <= 0)
     {
-       if(!status)
+       if (!status)
            hddLog(VOS_TRACE_LEVEL_ERROR, "%s: TDLS in progress."
                   "scan rejected  %d", __func__, status);
        else
            hddLog(VOS_TRACE_LEVEL_ERROR, "%s: TDLS teardown is ongoing %d",
                                           __func__, status);
-
+       hdd_wlan_block_scan_by_tdls();
        return status;
     }
 #endif