qcacmn: Modify the WIDE_BW_CHAN_SWITCH IE length check

Modify the length check to drop beacons which has
WLAN_ELEMID_WIDE_BAND_CHAN_SWITCH IE length less than 3. This is to
accommodate the addition of fields to this IE in the future.

Change-Id: I8cba60b631022f4348cce90ae41a003964040ad1
CRs-Fixed: 2884249

umac/scan/dispatcher/src/wlan_scan_utils_api.c

@@ -595,7 +595,7 @@ util_scan_parse_chan_switch_wrapper_ie(struct scan_cache_entry *scan_params,
 			scan_params->ie_list.country = (uint8_t *)sub_ie;
 			break;
 		case WLAN_ELEMID_WIDE_BAND_CHAN_SWITCH:
-			if (sub_ie->ie_len != WLAN_WIDE_BW_CHAN_SWITCH_IE_LEN)
+			if (sub_ie->ie_len < WLAN_WIDE_BW_CHAN_SWITCH_IE_LEN)
 				return QDF_STATUS_E_INVAL;
 			scan_params->ie_list.widebw = (uint8_t *)sub_ie;
 			break;