sched: EAS: kill incorrect nohz idle cpu kick

EAS won't allow NOHZ idle balancer until CPU's over utilized.  However
nohz_kick_needed() can return true.  This causes idle CPU wake up for
nothing.

Change-Id: I6e548442e29e4f85cda695e4c7101dd591b12fe6
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>