cpufreq: tegra194: change tegra239_cpufreq_soc to static

tegra239_cpufreq_soc is only used in tegra194-cpufreq.c now, change it
to static.

Fixes: 67688601 ("cpufreq: tegra194: Add support for Tegra239")
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>

drivers/cpufreq/tegra194-cpufreq.c

@@ -161,7 +161,7 @@ static const struct tegra_cpufreq_soc tegra234_cpufreq_soc = {
 	.num_clusters = 3,
 };
 
-const struct tegra_cpufreq_soc tegra239_cpufreq_soc = {
+static const struct tegra_cpufreq_soc tegra239_cpufreq_soc = {
 	.ops = &tegra234_cpufreq_ops,
 	.actmon_cntr_base = 0x4000,
 	.maxcpus_per_cluster = 8,