sched: fix compilation error with !CONFIG_SMP

Fix 'kernel/sched/core.c:2160:7: error: 'notif_required' undeclared'.

Change-Id: I418f700a5b5213cd7ba3d1628906dcc85995ef75
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
1 file changed