Revert "hpfs: endianness bugs"

This reverts commit 6a60244eea2a3e9fe60c454b257d9d0ea0973b64.
Revert "hpfs: assorted endianness annotations"

This reverts commit 498f0930f1dc4dd1698aa1bb03d91faf753c416f.
Revert "hpfs: annotate ea"

This reverts commit 43aeba4b37f34d31475f96ba9420c535454a374a.
Revert "hpfs: annotate struct hpfs_dirent"

This reverts commit 650c066b5dfc427df07112582e72e4d1fe71b23c.
Revert "hpfs: bitmaps are little-endian"

This reverts commit daf72035b17f7d86a4b801f2c53fef47ed119a88.