staging: unisys: Fix periodic_work.c parenthesis alignment

This patch fixes checkpatch.pl message:
 CHECK: Alignment should match open parenthesis

Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>