mako_hotplug: simplify whole process, I was not happy with the solution of cpu0->cpu2 / cpu1->cpu3 logic. And besides it created extra overhead.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cpufreq: conservative: fix compilation due to using the generic cpu_get_idle_time()

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