Staging: rtl8188eu: Fix warnings of no space before tabs.

This patch fixes the warnings of "please, no space before tabs" in the
file rtw_mlme.c. I have also modified the comment style and removed some
unnecessary tabs.

Signed-off-by: Elena Oat <oat.elena@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>