vmxcap: Add 5-level EPT bit

5-level EPT is present in Icelake Server CPUs and is supported by QEMU
('vmx-page-walk-5').

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220221145316.576138-2-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/kvm/vmxcap

@@ -249,6 +249,7 @@ controls = [
         bits = {
             0: 'Execute-only EPT translations',
             6: 'Page-walk length 4',
+            7: 'Page-walk length 5',
             8: 'Paging-structure memory type UC',
             14: 'Paging-structure memory type WB',
             16: '2MB EPT pages',