powerpc/32s: don't try to print hash table address.

Due to %p, (ptrval) is printed in lieu of the hash table address.

showing the hash table address isn't an operationnal need so just
don't print it.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>