commit fa86ee90eb1111267de67cb4272b5ce711f18cbb upstream

Add a cpuidle driver that calls the architecture default_idle routine.

To be used in conjunction with the haltpoll governor.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NYihao Wu <wuyihao@linux.alibaba.com>
Acked-by: NMichael Wang <yun.wang@linux.alibaba.com>