Resync QEMU's copy of the Linux kernel headers from
commit 2ef14f4. This adds the ARM KVM headers, since ARM KVM
support has just hit mainline via Russell's ARM tree.
This is not a pure sync -- I have removed by hand some changes
that would have reverted updates for s390x and ppc which have not
yet hit mainline.
Signed-off-by: Peter Maydell <firstname.lastname@example.org>