ldlinux: workaround for avoiding EDD error on btrfs probe
When installing Syslinux in an NTFS volume and then booting it up,
Syslinux will print on the screen an EDD error ocurred on btrfs probing
because that volume is not actually a btrfs one. Thus, to work around
that issue add ntfs_fs_ops structure just before the btrfs_fs_ops so
that fs_init() function will execute the ntfs_fs_ops->fs_init() function
first, and on success, btrfs_fs_ops->fs_init() won't be executed either.
Signed-off-by: Paulo Alcantara <pcacjr@gmail.com>