qcacld-3.0: Change copy right year of wlan_hdd_sysfs_set_fw_mode_cfg.c

wlan_hdd_sysfs_set_fw_mode_cfg.c is derived from wlan_hdd_wext.c and hence
maintain original copyright year in wlan_hdd_sysfs_set_fw_mode_cfg.c.

Change-Id: I034fbb2bc9ea205ca92ee017c3e9111405306bd7
CRs-fixed: 2698256

core/hdd/src/wlan_hdd_sysfs_set_fw_mode_cfg.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2011-2020 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the