usr.sbin/fstyp: Fix incorrect pfs_type test in ondisk inode

"ipdata.meta.pfs_type & HAMMER2_PFSTYPE_SUPROOT" happened to have
the same result (except HAMMER2_PFSTYPE_DUMMY could also match).

Obtained from: Dragonfly (git 29e6489bbd4f8e237c9c17b300ac8b711f36770)