auto_hotplug.c: after boostpulse is done instead of waiting 5 seconds to offline the core, now it offlines after 2 seconds. Average 15 sample times instead of 12. A little change on when to disable a core when the boostpulse flag is not on because since we now average more times now when the avg_running is less than the disable_load and online_cpus > 1 we offline a core.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>