prima: max_scan_ie_len should have the combined lenght of all IEs

max_scan_ie_len of wiphy structure should be updated with the
max length of IEs which can be added to a probe request frame.
In current implement it has been updated with the max length of
an IE.

Change-Id: I28ff17e9de472040da3f85a02d3b31cfe46811b4
CRs-Fixed: 820817
diff --git a/CORE/HDD/src/wlan_hdd_wext.c b/CORE/HDD/src/wlan_hdd_wext.c
index b4db7c3..9af3329 100644
--- a/CORE/HDD/src/wlan_hdd_wext.c
+++ b/CORE/HDD/src/wlan_hdd_wext.c
@@ -1359,7 +1359,7 @@
    pWextState->roamProfile.bWPSAssociation = VOS_FALSE;
    pWextState->roamProfile.bOSENAssociation = VOS_FALSE;
    pWextState->roamProfile.nAddIEScanLength = 0;
-   memset(pWextState->roamProfile.addIEScan, 0 , SIR_MAC_MAX_IE_LENGTH+2);
+   memset(pWextState->roamProfile.addIEScan, 0 , SIR_MAC_MAX_ADD_IE_LENGTH+2);
    pWextState->roamProfile.pAddIEAssoc = (tANI_U8 *)NULL;
    pWextState->roamProfile.nAddIEAssocLength = 0;