acpi-cpufreq: Fix some x86/x86-64 acpi-cpufreq driver issues

This patch addresses some issues in x86/x86-64 acpi-cpufreq driver:

1.  Current memory allocation for acpi_perf_data is actually open-coded
   alloc_percpu().  The patch defines and handles acpi_perf_data as percpu
   data.  The code will be cleaner and easier to be maintained with this
   change.

2. Won't load driver in acpi_cpufreq_early_init() failure case.

3. Add __init for acpi_cpufreq_early_init().

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index f9f987f..ec3ffda 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -232,7 +232,7 @@
 
 extern int acpi_processor_preregister_performance(struct
 						  acpi_processor_performance
-						  **performance);
+						  *performance);
 
 extern int acpi_processor_register_performance(struct acpi_processor_performance
 					       *performance, unsigned int cpu);