qcacld-3.0: Avoid sending positive RSSI value to framework.

qcacld-2.0 to qcacld-3.0 propagation

Currently if STA is very near to connected AP, it sends the
positive value of RSSI to framework. Framework checks this RSSI
and if positive(greater than 0) then it consider RSSI as -127dbm
which may lead to disconnection.
So changes are done to avoid sending the positive RSSI value
greater than 0.

Change-Id: Ib417f48345e3f78dba54d68969fa15d294f313b9
CRs-Fixed: 842243

core/hdd/src/wlan_hdd_wext.c

@@ -1014,6 +1014,9 @@ static void hdd_get_rssi_cb(int8_t rssi, uint32_t staId, void *pContext)
 	/* copy over the rssi */
 	pAdapter->rssi = rssi;
 
+	if (pAdapter->rssi > 0)
+		pAdapter->rssi = 0;
+
 	/* notify the caller */
 	complete(&pStatsContext->completion);