rtlwifi: Add firmware for rtl8821ae

This firmware is for a driver for the Realtek 8821AE PCI WIFI device.
It came from a tarball from Realtek named
wifi_driver_8821ae_0018.1129.2013.tar.gz and is allowed to be
distributed under the LICENCE.rtlwifi_firmware.txt license.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
[bwh: Fix filename in WHENCE]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

WHENCE

@@ -1962,6 +1962,15 @@ Licence: Redistributable. See LICENCE.rtlwifi_firmware.txt for details.
 
 --------------------------------------------------------------------------
 
+Driver: rtl8821ae - Realtek 802.11n WLAN driver for RTL8821AE
+
+Info: Taken from Realtek version wifi_driver_8821ae_0018.1129.2013.tar.gz
+File: rtlwifi/rtl8821aefw.bin
+
+Licence: Redistributable. See LICENCE.rtlwifi_firmware.txt for details.
+
+--------------------------------------------------------------------------
+
 Driver: r8169 - RealTek 8169/8168/8101 ethernet driver.
 
 File: rtl_nic/rtl8168d-1.fw