SECURITY: remove nameidata arg from inode_follow_link.

No ->inode_follow_link() methods use the nameidata arg, and
it is about to become private to namei.c.
So remove from all inode_follow_link() functions.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index fe30d3b..7f20b40 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -871,7 +871,7 @@
 	touch_atime(link);
 	nd_set_link(nd, NULL);
 
-	error = security_inode_follow_link(link->dentry, nd);
+	error = security_inode_follow_link(dentry);
 	if (error)
 		goto out_put_nd_path;