PM / devfreq: fix private_data

The "private_date" field in struct devfreq_dev_status almost certainly
wants to be "private_data"; since there are no in-tree users of this
functionality, now seems like an easy time to make the fix.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index afb9458..98ce812 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -41,7 +41,7 @@
 	unsigned long total_time;
 	unsigned long busy_time;
 	unsigned long current_frequency;
-	void *private_date;
+	void *private_data;
 };
 
 /**