PM / OPP: Use snprintf() to avoid kasprintf() and kfree()

Use snprintf() to avoid unnecessary initializations, avoid calling
kfree().

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/opp/debugfs.c

@@ -41,16 +41,15 @@ static bool opp_debug_create_supplies(struct dev_pm_opp *opp,
 {
 	struct dentry *d;
 	int i;
-	char *name;
 
 	for (i = 0; i < opp_table->regulator_count; i++) {
-		name = kasprintf(GFP_KERNEL, "supply-%d", i);
+		char name[15];
+
+		snprintf(name, sizeof(name), "supply-%d", i);
 
 		/* Create per-opp directory */
 		d = debugfs_create_dir(name, pdentry);
 
-		kfree(name);
-
 		if (!d)
 			return false;