Staging: rtl8192: Simplifying if-else statement

This patch simplifies the code by not having two identical paths and
fixes the warning given by checkpatch.pl: "else is not useful after
a break or return".

Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>