HDD: Handle correct definition of struct wiphy_vendor_command

Change-Id Iceb9e93f4b6e0ee49fea80848dfae2b9ac7999a7 was used to
update the driver with correct definition. Unfortunately this
change missed updating one function definition.
Changes are made to address the issue.

Change-Id: I1d36eea2cb96d60bfc4590b4ceaa2f5199ceab03
CRs-Fixed: 783809
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index b9692d8..542efc1 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -3178,7 +3178,7 @@
 
 static int wlan_hdd_cfg80211_extscan_set_bssid_hotlist(struct wiphy *wiphy,
                                         struct wireless_dev *wdev,
-                                        void *data, int dataLen)
+                                        const void *data, int dataLen)
 {
     tpSirEXTScanSetBssidHotListReqParams pReqMsg = NULL;
     struct net_device *dev                     = wdev->netdev;