arm: imx: Add MODULE_ALIAS for cpufreq

Without this, the imx6q-cpufreq driver isn't loaded
automatically when built as a module

Tested on wandboard quad with a fedora 27 kernel rpm
Signed-off-by: NNicolas Chauvet <kwizart@gmail.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/imx6q-cpufreq.c

@@ -504,6 +504,7 @@ static struct platform_driver imx6q_cpufreq_platdrv = {
 };
 module_platform_driver(imx6q_cpufreq_platdrv);
 
+MODULE_ALIAS("platform:imx6q-cpufreq");
 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 MODULE_DESCRIPTION("Freescale i.MX6Q cpufreq driver");
 MODULE_LICENSE("GPL");