Staging: lustre: Fix space prohibited between function and open paranthesis

This patch fixes the following checkpatch.pl warning in
lnet/lnet/config.c-
WARNING: space prohibited between function name and open parenthesis '('

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>