base/devres.c: quiet sparse noise about context imbalance

devres_release_all and devres_release_group both aquire the lock
&dev->devres_lock but the release of that lock is done in release_nodes.
This results in sparse noise about context imbalance.

Add a lock annotation to release_nodes to quiet this noise.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/devres.c

@@ -397,6 +397,7 @@ static int remove_nodes(struct device *dev,
 
 static int release_nodes(struct device *dev, struct list_head *first,
 			 struct list_head *end, unsigned long flags)
+	__releases(&dev->devres_lock)
 {
 	LIST_HEAD(todo);
 	int cnt;