staging: rtl8188eu: remove unnecessary RETURN label

Remove unnecessary RETURN label and use return directly instead. Since
the return type of rtw_free_netdev() is void, remove the return at the
end of the function.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200206085924.21531-1-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>