staging: lustre: space prohibited between function name and open parenthesis '('

This patch fixes checkpatch.pl warning.
WARNING: space prohibited between function name and open parenthesis '('

Signed-off-by: Alberto Pires de Oliveira Neto <mrpenguin2005@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>