PM / sleep: Asynchronous threads for resume_noirq
In analogy with commits 5af84b82 and 97df8c12, using asynchronous threads can improve the overall resume_noirq time significantly. One typical case is: In resume_noirq phase and for the PCI devices, the function pci_pm_resume_noirq() will be called, and there is one d3_delay (10ms) at least. With the way of asynchronous threads, we just need wait d3_delay time once in parallel for each calling, which saves much time to resume quickly. Signed-off-by: NChuansheng Liu <chuansheng.liu@intel.com> Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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