DOC: Fix wrong identifier name in Documentation/driver-model/devres.txt

Above and below we talk about my_midlayer_create_something, I assume that is
also meant here.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 5163b85..6c8d8f2 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -182,7 +182,7 @@
 
 	...
 
-	devres_close_group(dev, my_midlayer_something);
+	devres_close_group(dev, my_midlayer_create_something);
 	return 0;
   }