cpufreq: Remove needless bios_limit check in show_bios_limit()

Initially, bios_limit attribute will be created if driver->bios_limit
is set in cpufreq_add_dev_interface(). So remove the redundant check
for latter show operation.
Signed-off-by: Yue Hu <huyue2@yulong.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq.c

@@ -894,11 +894,9 @@ static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf)
 {
 	unsigned int limit;
 	int ret;
-	if (cpufreq_driver->bios_limit) {
 	ret = cpufreq_driver->bios_limit(policy->cpu, &limit);
 	if (!ret)
 		return sprintf(buf, "%u\n", limit);
-	}
 	return sprintf(buf, "%u\n", policy->cpuinfo.max_freq);
 }