qcacmn: Correct RSN IE length check

The minimal size of RSN ie data size is
2 (only contain version field).

The original 3 will cause driver identify
such AP beacon/probe rsp as invalid and
do not connect to it.

Change-Id: Idceaf936cbd0ca448f82d9594b35ca346c6513d4
CRs-Fixed: 2294094

umac/cmn_services/cmn_defs/inc/wlan_cmn_ieee80211.h

@@ -446,7 +446,7 @@ struct wlan_rsn_ie_hdr {
 	u8 version[2];
 };
 
-#define WLAN_RSN_IE_MIN_LEN                    3
+#define WLAN_RSN_IE_MIN_LEN                    2
 
 /**
  * struct wlan_rsn_ie: rsn ie info