With hugetlbfs support emerging on e500, we should also support KVM
backing its guest memory by it.

This patch adds support for hugetlbfs into the e500 shadow mmu code.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Acked-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>