wlan: HDD layer logging enhancement.

Added logs which should get printed when some unexpected error
happens.In this gerrit updating wlan_hdd_p2p.c, wlan_hdd_scan.c
and wlan_hdd_tdls.c files.

Change-Id: Ia6bf10aeaea942a631060763acae79b0a25ad144
CRs-Fixed: 762563
diff --git a/CORE/HDD/src/wlan_hdd_tdls.c b/CORE/HDD/src/wlan_hdd_tdls.c
index 6b2db12..22eb036 100644
--- a/CORE/HDD/src/wlan_hdd_tdls.c
+++ b/CORE/HDD/src/wlan_hdd_tdls.c
@@ -1939,7 +1939,7 @@
 
     if ((NULL == pHddCtx) || (NULL == pHddTdlsCtx))
     {
-       VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
+       VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
                FL(" pHddCtx or  pHddTdlsCtx points to NULL"));
        return;
     }