cpufreq: ARM big LITTLE: Move cpu_to_cluster() to arm_big_little.h

The cpu_to_cluster() function may be used by glue drivers, so it's
better to keep it in arm_big_little.h.

[rjw: Changelog]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/arm_big_little.c

@@ -40,11 +40,6 @@ static struct clk *clk[MAX_CLUSTERS];
 static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS];
 static atomic_t cluster_usage[MAX_CLUSTERS] = {ATOMIC_INIT(0), ATOMIC_INIT(0)};
 
-static int cpu_to_cluster(int cpu)
-{
-	return topology_physical_package_id(cpu);
-}
-
 static unsigned int bL_cpufreq_get(unsigned int cpu)
 {
 	u32 cur_cluster = cpu_to_cluster(cpu);

drivers/cpufreq/arm_big_little.h

@@ -34,6 +34,11 @@ struct cpufreq_arm_bL_ops {
 	int (*init_opp_table)(struct device *cpu_dev);
 };
 
+static inline int cpu_to_cluster(int cpu)
+{
+	return topology_physical_package_id(cpu);
+}
+
 int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops);
 void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops);