fs/overlayfs/namei.c: get rid of include ../internal.h

Added for the sake of vfs_path_lookup(), which is in linux/namei.h
these days.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/overlayfs/namei.c

@@ -14,8 +14,6 @@
 #include <linux/exportfs.h>
 #include "overlayfs.h"
 
-#include "../internal.h"	/* for vfs_path_lookup */
-
 struct ovl_lookup_data {
 	struct super_block *sb;
 	const struct ovl_layer *layer;