cpufreq: CPPC: Use scope-based cleanup helper

Replace the manual cpufreq_cpu_put() with __free(put_cpufreq_policy)
annotation for policy references. This reduces the risk of reference
counting mistakes and aligns the code with the latest kernel style.

No functional change intended.

Signed-off-by: Zihuan Zhang <zhangzihuan@kylinos.cn>
[ Viresh: Minor changes ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: Zihuan Zhang

drivers/cpufreq/cppc_cpufreq.c

@@ -722,8 +722,8 @@ static int cppc_get_perf_ctrs_sample(int cpu,
 
 static unsigned int cppc_cpufreq_get_rate(unsigned int cpu)
 {
+	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpu);
 	struct cppc_perf_fb_ctrs fb_ctrs_t0 = {0}, fb_ctrs_t1 = {0};
-	struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
 	struct cppc_cpudata *cpu_data;
 	u64 delivered_perf;
 	int ret;
@@ -733,8 +733,6 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpu)
 
 	cpu_data = policy->driver_data;
 
-	cpufreq_cpu_put(policy);
-
 	ret = cppc_get_perf_ctrs_sample(cpu, &fb_ctrs_t0, &fb_ctrs_t1);
 	if (ret) {
 		if (ret == -EFAULT)