cpufreq: schedutil: Improve prints messages with pr_fmt

Prefix print messages with KBUILD_MODNAME, i.e 'cpufreq_schedutil: '.
This helps to keep similar formatting for all the print messages
particular to a file and identify those easily in kernel logs.

Its already done this way for rest of the governors.

Along with that, remove the (now) redundant bits from a print message.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/sched/cpufreq_schedutil.c

@@ -9,6 +9,8 @@
  * published by the Free Software Foundation.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/cpufreq.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -388,7 +390,7 @@ static int sugov_init(struct cpufreq_policy *policy)
 	mutex_unlock(&global_tunables_lock);
 
 	sugov_policy_free(sg_policy);
-	pr_err("cpufreq: schedutil governor initialization failed (error %d)\n", ret);
+	pr_err("initialization failed (error %d)\n", ret);
 	return ret;
 }