wlan: Add manual indexing to NAN event in vendor_events

vendor_events array indexing is broken due to manual indexing
of one of the previous commands. So auto indexing of vendor_events
doesn't work anymore. Use manual indexing for NAN event as well.

Change-Id: Ib58519d1c5b8e14ad2ef266bbde6a2dd37461830
CRs-fixed: 1114615
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index d58daae..1c3d157 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -8305,7 +8305,7 @@
     },
 
 
-    {
+    [QCA_NL80211_VENDOR_SUBCMD_NAN_INDEX] = {
         .vendor_id = QCA_NL80211_VENDOR_ID,
         .subcmd = QCA_NL80211_VENDOR_SUBCMD_NAN
     },