ACPI: Discard invalid elements in _PSS package

Make sure that the _PSS list is sorted in
descending order by typical power dissipation.

http://bugzilla.kernel.org/show_bug.cgi?id=7880

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c

@@ -668,8 +668,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	data->max_freq = perf->states[0].core_frequency * 1000;
 	/* table init */
 	for (i=0; i<perf->state_count; i++) {
-		if (i>0 && perf->states[i].core_frequency ==
-		    perf->states[i-1].core_frequency)
+		if (i>0 && perf->states[i].core_frequency >=
+		    data->freq_table[valid_states-1].frequency / 1000)
 			continue;
 
 		data->freq_table[valid_states].index = i;