staging: lustre: Fix space prohibited between function name and open parenthesis in lcommon_cl.c

This patch fixed "WARNING: space prohibited between function name
and open parenthesis '(' found by checkpatch.pl,
in lustre/lclient/lcommon_cl.c

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>