cpufreq: loongson2: use cpufreq_generic_init()

Use generic cpufreq_generic_init() routine instead of replicating the same code
here. This driver wasn't setting transition_latency and so is getting set to 0
by default. Lets mark it explicitly by calling the generic routine with
transition_latency as 0.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/loongson2_cpufreq.c

@@ -131,8 +131,7 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		return ret;
 	}
 
-	return cpufreq_table_validate_and_show(policy,
-					    &loongson2_clockmod_table[0]);
+	return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
 }
 
 static int loongson2_cpufreq_exit(struct cpufreq_policy *policy)