wlan: Fix (-1) return values to conform to quic kernel coding standard

Change-Id: I055655e1c31ef30dd4fd329e2eb0187811bf6d48
CR-Fixed: NA
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index a2619e1..77ba092 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -4781,7 +4781,7 @@
     {
         hddLog(VOS_TRACE_LEVEL_ERROR, 
                 "%s: No connection when AMP is on", __func__);
-        return -1;
+        return -ECONNREFUSED;
     }
 #endif
     /*initialise security parameters*/