KVM: PPC: Book3S HV: Access guest VPA in BE

There are a few shared data structures between the host and the guest. Most
of them get registered through the VPA interface.

These data structures are defined to always be in big endian byte order, so
let's make sure we always access them in big endian.

Signed-off-by: Alexander Graf <agraf@suse.de>

diff --cc arch/powerpc/kvm/book3s_hv.c
Simple merge

diff --cc arch/powerpc/kvm/book3s_hv_ras.c
Simple merge