fix:

 ERROR: "cpumask_of_cpu_map" [drivers/acpi/processor.ko] undefined!
 ERROR: "cpumask_of_cpu_map" [arch/x86/kernel/microcode.ko] undefined!
 ERROR: "cpumask_of_cpu_map" [arch/x86/kernel/cpu/cpufreq/speedstep-ich.ko] undefined!
 ERROR: "cpumask_of_cpu_map" [arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko] undefined!
Signed-off-by: NIngo Molnar <mingo@elte.hu>