Staging: lustre: o2iblnd_cb.c: Removed the rest of unnecessary spaces before parenthesis

I removed all the 'unneeded space' warnings given by checkpatch.pl

Signed-off-by: Guillaume Matheron <guillaume.matheron@ens.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>