switch ->put_link() from dentry to inode

only one instance looks at that argument at all; that sole
exception wants inode rather than dentry.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/libfs.c b/fs/libfs.c
index c5f3373..01c337b 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1024,7 +1024,7 @@
 }
 EXPORT_SYMBOL(noop_fsync);
 
-void kfree_put_link(struct dentry *dentry, void *cookie)
+void kfree_put_link(struct inode *unused, void *cookie)
 {
 	kfree(cookie);
 }