staging: rtl8192e: Fix unnecessary space before function pointer arguments

This patch fixes these warning messages found by checkpatch.pl:
WARNING: Unnecessary space before function pointer arguments

Signed-off-by: Melike Yurtoglu <aysemelikeyurtoglu@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>