[Intel-gfx] Intelligent power sharing driver

[Jesse Barnes]

This patchset adds the core IPS driver to drivers/platform/x86, along
with some helper code in the timer subsystem to allow for deferrable
on-stack timers.

Note that this patchset doesn't include the i915 specific bits for
monitoring power consumption.  We're doing final validation on those
now so I expect to be able to post them soon.

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center