devres: fix devres_get()

Currently, devres_get() passes devres_free() the pointer to devres,
but devres_free() should be given with the pointer to resource data.

Fixes: 9ac7849e35f7 ("devres: device resource management")
Signed-off-by: Masahiro Yamada <[e-mail]>
Acked-by: Tejun Heo <[e-mail]>
Cc: stable <[e-mail]> # 2.6.21+
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/base/devres.c

···
 	if (!dr) {
 		add_dr(dev, &new_dr->node);
 		dr = new_dr;
-		new_dr = NULL;
+		new_res = NULL;
 	}
 	spin_unlock_irqrestore(&dev->devres_lock, flags);
-	devres_free(new_dr);
+	devres_free(new_res);
 
 	return dr->data;
 }