drivers: base: power: remove wakeup_sources_stats_dentry variable

wakeup_sources_stats_dentry is assigned when the debugfs file is
created, but then never used ever again.  So no need for it at all, just
remove it and call debugfs_create_file() on its own.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/wakeup.c

@@ -968,8 +968,6 @@ void pm_wakep_autosleep_enabled(bool set)
 }
 #endif /* CONFIG_PM_AUTOSLEEP */
 
-static struct dentry *wakeup_sources_stats_dentry;
-
 /**
  * print_wakeup_source_stats - Print wakeup source statistics information.
  * @m: seq_file to print the statistics into.
@@ -1099,8 +1097,8 @@ static const struct file_operations wakeup_sources_stats_fops = {
 
 static int __init wakeup_sources_debugfs_init(void)
 {
-	wakeup_sources_stats_dentry = debugfs_create_file("wakeup_sources",
-			S_IRUGO, NULL, NULL, &wakeup_sources_stats_fops);
+	debugfs_create_file("wakeup_sources", S_IRUGO, NULL, NULL,
+			    &wakeup_sources_stats_fops);
 	return 0;
 }