staging: lustre: include: linux: libcfs: Remove intialization of static to 0

This patch fixes checpatch.pl error in file libcfs_time.h
ERROR: do not initialise statics to 0 or NULL

Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>