alucard cpu governor: removed useless checking code
darkness, nightmare cpu governors: removed useless checking code
alucard_hotplug ver2: optimized.
alucard_hotplug ver2: suspended as bool instead of unsigned int.
alucard_hotplug: schedule delayed work on hotplugging cpu
alucard_hotplug: implemented min_cpus_online for @Dorimanx, my dear friend.

Dorimanx note:
I made full SYNC with Alucard24 source.

Big thanks @Alucard24 for this change :)
alucard_hotplug: hotplug_onoff declared as bool
alucard cpu governor: use spinlock instead of mutex.