stop passing nameidata to ->lookup()

Just the flags; only NFS cares even about that, but there are
legitimate uses for such argument.  And getting rid of that
completely would require splitting ->lookup() into a couple
of methods (at least), so let's leave that alone for now...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index abcc58f..7834a51 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -134,7 +134,7 @@
 
 
 static struct dentry *squashfs_lookup(struct inode *dir, struct dentry *dentry,
-				 struct nameidata *nd)
+				 unsigned int flags)
 {
 	const unsigned char *name = dentry->d_name.name;
 	int len = dentry->d_name.len;