When nohash and book3s header were split, some hash related stuff
remained in the nohash header. This patch removes them.
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
[mpe: Duplicate pte_young() to avoid circular header dependency]
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>