class_find_device: fix reference to argument "match"

There is no argument "fn".

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 6e81088..71059e3 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -406,7 +406,7 @@
  *
  * Note, you will need to drop the reference with put_device() after use.
  *
- * @fn is allowed to do anything including calling back into class
+ * @match is allowed to do anything including calling back into class
  * code.  There's no locking restriction.
  */
 struct device *class_find_device(struct class *class, struct device *start,