ACPI: HW P-state coordination support

Treat HW coordination as independent CPUs.
This enables per-cpu monintoring of P-states

http://bugzilla.kernel.org/show_bug.cgi?id=5737



Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>