staging: lustre: fix checkpatch issue regarding pointer coding style

Fix the following checkpatch error:
ERROR: "(foo*)" should be "(foo *)"

Signed-off-by: Kristina Martsenko <kristina.martsenko@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>