vfs: switch ->show_options() to struct dentry *

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
index fe8e7e9..db29695 100644
--- a/fs/ntfs/inode.h
+++ b/fs/ntfs/inode.h
@@ -298,7 +298,7 @@
 
 extern int ntfs_read_inode_mount(struct inode *vi);
 
-extern int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt);
+extern int ntfs_show_options(struct seq_file *sf, struct dentry *root);
 
 #ifdef NTFS_RW