If L0 has disabled EPT, don't advertise unrestricted
mode at all since it depends on EPT to run real mode code.

Fixes: 92fbc7b1
Cc: stable@vger.kernel.org
Reviewed-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NBandan Das <bsd@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>