staging: rtl8188eu: Cleanup firmware initialization code

Using rtl8188ee's (drivers/net/wireless/rtlwifi/rtl8188ee/fw.c) neat and clean
firmware initialization code to replace rtl8188eu's messy firmware
initialization code.

Signed-off-by: navin patidar <navin.patidar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>