qcacld-3.0: Enable RX FCS reporting

fcs_err_count member of structure station_info
introduced from kernel 4.20.
Enable it accordingly from 4.20.

Change-Id: Ic373cb4f95a9698c8ef25c829f39bd21cd8f4a26
CRs-Fixed: 3183697

core/hdd/src/wlan_hdd_stats.c

@@ -5691,7 +5691,8 @@ void hdd_wlan_fill_per_chain_rssi_stats(struct station_info *sinfo,
 }
 #endif
 
-#if defined(CFG80211_RX_FCS_ERROR_REPORTING_SUPPORT)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 20, 0)) || \
+	defined(CFG80211_RX_FCS_ERROR_REPORTING_SUPPORT)
 static void hdd_fill_fcs_and_mpdu_count(struct hdd_adapter *adapter,
 					struct station_info *sinfo)
 {