revert "scheduler: domain: init next_balance in nohz_idle_balancer with jiffies"

[SR 941625] reboot stress test fail with 14r9

Change-Id: I60a365591cbc93645a0a7df289ac99c7d64ec01a
Reviewed-on: http://mcrd1-5.corpnet.asus/code-review/master/45238
Reviewed-by: Singhome Lee <singhome_lee@asus.com>
Tested-by: Singhome Lee <singhome_lee@asus.com>