initial import of francisco francos hotplug control from mako
rq_stats: add report_load_at_max_freq to the header file.
rq_stats: don't need to call the update_average_load every POSTCHANGE transition, specially because we're already calling update_average_load every msecs_to_jiffies(HZ) from the Hotplug driver. With all the locks & unlocks involved plus all the time calling and making some calculations (divisions as well) we may as well don't have the stats driver to call it that much.
major redesign of hotplug routines
cpufreq:interactive updates for mako hotplug
some nice improvements
latest ondemand from francos mako kernel
now we are in sync with AOSP Kernel