ACPI: cpufreq, processor: fix compile error in drivers/acpi/processor_perflib.c

When trying to build 2.6.28-rc1 on ia64, make aborts with:

  CC      drivers/acpi/processor_perflib.o
  drivers/acpi/processor_perflib.c:41:28: error: asm/cpufeature.h: No such file or directory
  drivers/acpi/processor_perflib.c: In function ‘acpi_processor_get_performance_info’:
  drivers/acpi/processor_perflib.c:364: error: implicit declaration of function ‘boot_cpu_has’
  drivers/acpi/processor_perflib.c:364: error: ‘X86_FEATURE_EST’ undeclared (first use in this function)
  drivers/acpi/processor_perflib.c:364: error: (Each undeclared identifier is reported only once
  drivers/acpi/processor_perflib.c:364: error: for each function it appears in.)
  make[2]: *** [drivers/acpi/processor_perflib.o] Error 1
  make[1]: *** [drivers/acpi] Error 2
  make: *** [drivers] Error 2

this patch fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/processor_perflib.c

@@ -38,7 +38,10 @@
 
 #include <asm/uaccess.h>
 #endif
+
+#ifdef CONFIG_X86
 #include <asm/cpufeature.h>
+#endif
 
 #include <acpi/acpi_bus.h>
 #include <acpi/processor.h>
@@ -360,11 +363,13 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr)
 	 * the BIOS is older than the CPU and does not know its frequencies
 	 */
  update_bios:
+#ifdef CONFIG_X86
 	if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){
 		if(boot_cpu_has(X86_FEATURE_EST))
 			printk(KERN_WARNING FW_BUG "BIOS needs update for CPU "
 			       "frequency support\n");
 	}
+#endif
 	return result;
 }