cpufreq: pmac32: use cpufreq_generic_init()

Use generic cpufreq_generic_init() routine instead of replicating the same code
here.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/pmac32-cpufreq.c

@@ -392,12 +392,7 @@ static int pmac_cpufreq_target(	struct cpufreq_policy *policy,
 
 static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
-	if (policy->cpu != 0)
-		return -ENODEV;
-
-	policy->cpuinfo.transition_latency	= transition_latency;
-
-	return cpufreq_table_validate_and_show(policy, pmac_cpu_freqs);
+	return cpufreq_generic_init(policy, pmac_cpu_freqs, transition_latency);
 }
 
 static u32 read_gpio(struct device_node *np)