cpufreq: imx6q: Register an Energy Model

Try and register an Energy Model from imx6q-cpufreq to allow
interested subsystems like the task scheduler to use the provided
information.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/cpufreq/imx6q-cpufreq.c

@@ -210,6 +210,7 @@ static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
 	policy->clk = clks[ARM].clk;
 	ret = cpufreq_generic_init(policy, freq_table, transition_latency);
 	policy->suspend_freq = max_freq;
+	dev_pm_opp_of_register_em(policy->cpus);
 
 	return ret;
 }