[ACPI] pci_set_power_state() now calls

	platform_pci_set_power_state()
		and ACPI can answer

http://bugzilla.kernel.org/show_bug.cgi?id=4277



Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>