Merge branch 'scheduler'

Conflicts:
build/jam/packages/Haiku
headers/os/kernel/OS.h
headers/os/opengl/GLRenderer.h
headers/private/shared/cpu_type.h
src/add-ons/kernel/drivers/power/acpi_batter

Merge branch 'scheduler'

Conflicts:
build/jam/packages/Haiku
headers/os/kernel/OS.h
headers/os/opengl/GLRenderer.h
headers/private/shared/cpu_type.h
src/add-ons/kernel/drivers/power/acpi_battery/acpi_battery.h
src/bin/sysinfo.cpp
src/bin/top.c
src/system/kernel/arch/x86/arch_system_info.cpp
src/system/kernel/port.cpp

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kernel: Rework cpuidle module

* Create new interface for cpuidle modules (similar to the cpufreq
interface)
* Generic cpuidle module is no longer needed
* Fix and update Intel C-State module

kernel: Add cpufreq module for Intel P-states

Since Sandy Bridge managing P-states on Intel processors is much easier
and more powerful than when using previous versions of EIST.