pseries: Fix endian issues in onlining cpu threads (bsc#907069).

suse-commit: f800165ae996d9104b59c2720e884362fdbc4e3f
pseries: Fix endian issues in cpu hot-removal (bsc#907069).

suse-commit: c43853f4543d5a3c82fb61dab190affd6c67ee86
powerpc/pseries: Make CPU hotplug path endian safe (bsc#907069).

suse-commit: 17abcdae6ec354e07ffa7bae4165125276936404