Staging: lustre: Remove unnecessary else after return

WARNING: else is not generally useful after a break or return
Remove unnecessary else after return. That was found by running
checkpatch

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