Staging:lustre:lustre:obdclass:Remove return from void function

This patch removes the return statement at the end of a void function as
it is not necessary.This was found by checkpatch.pl .

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>