tools headers UAPI: Sync linux/kvm.h with the kernel sources

tools headers UAPI: Sync linux/kvm.h with the kernel sources

To pick the changes in:

  da142f3d373a6dda ("KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay")

That just rebuilds perf, as these patches don't add any new KVM ioctl to
be harvested for the 'perf trace' ioctl syscall argument beautifiers.

This addresses this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Please see tools/include/uapi/README for further details.

Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>