rtlwifi: de-dupe rtl8192e WiFi firmware

The rtl8192eefw.bin and rtl8192eu_nic.bin WiFi firmware are identical according
to sha256sum so remove and link the former to the later as rtl8192eu_nic.bin
also has matching wowlan and ap_wowlan variants.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
CC: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -3170,7 +3170,8 @@ Info: Initial version taken from Realtek version
       rtl_92ce_92se_92de_8723ae_88ee_8723be_92ee_linux_mac80211_0017.1224.2013
       Updated Jan. 14, 2015 with file added by Realtek to
       http://github.com/lwfinger/rtlwifi_new.git.
-File: rtlwifi/rtl8192eefw.bin
+      Same firmware rtl8192eu_nic.bin so just link them
+Link: rtlwifi/rtl8192eefw.bin -> rtl8192eu_nic.bin
 
 Licence: Redistributable. See LICENCE.rtlwifi_firmware.txt for details.