cpufreq: mt8173: Mark mt8173_cpufreq_driver_init as __init

This function is only called once at boot by device_initcall(), so mark
it as __init.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/mt8173-cpufreq.c

@@ -573,7 +573,7 @@ static struct platform_driver mt8173_cpufreq_platdrv = {
 	.probe		= mt8173_cpufreq_probe,
 };
 
-static int mt8173_cpufreq_driver_init(void)
+static int __init mt8173_cpufreq_driver_init(void)
 {
 	struct platform_device *pdev;
 	int err;