Enable VMFUNC in the secondary execution controls.  This simplifies the
changes necessary to expose it to nested hypervisors.  VMFUNCs still
cause #UD when invoked.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NBandan Das <bsd@redhat.com>
Acked-by: NDavid Hildenbrand <david@redhat.com>
Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>