bcachefs: Repair mismatches in inode hash seed, type

Different versions of the same inode (same inode number, different
snapshot ID) must have the same hash seed and type - lookups require
this, since they see keys from different snapshots simultaneously.

To repair we only need to make the inodes consistent, hash_check_key()
will do the rest.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>