cpufreq: cppc: Set policy->boost_supported

With a later commit, the cpufreq core will call the ->set_boost()
callback only if the policy supports boost frequency. The
boost_supported flag is set by the cpufreq core if policy->freq_table is
set and one or more boost frequencies are present.

For other drivers, the flag must be set explicitly.

With this, the local variable boost_supported isn't required anymore.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: vireshk

drivers/cpufreq/cppc_cpufreq.c

@@ -34,8 +34,6 @@
  */
 static LIST_HEAD(cpu_data_list);
 
-static bool boost_supported;
-
 static struct cpufreq_driver cppc_cpufreq_driver;
 
 #ifdef CONFIG_ACPI_CPPC_CPUFREQ_FIE
@@ -653,7 +651,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	 * is supported.
 	 */
 	if (caps->highest_perf > caps->nominal_perf)
-		boost_supported = true;
+		policy->boost_supported = true;
 
 	/* Set policy->cur to max now. The governors will adjust later. */
 	policy->cur = cppc_perf_to_khz(caps, caps->highest_perf);
@@ -791,11 +789,6 @@ static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
 	struct cppc_perf_caps *caps = &cpu_data->perf_caps;
 	int ret;
 
-	if (!boost_supported) {
-		pr_err("BOOST not supported by CPU or firmware\n");
-		return -EINVAL;
-	}
-
 	if (state)
 		policy->max = cppc_perf_to_khz(caps, caps->highest_perf);
 	else