staging: lustre: lnet: klnds: o2iblnd: Removed useless return keywords.

Removed return keyword from void functions. Removed following checkpatch.pl warnings:
WARNING: void function return statements are not generally useful

Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>