KVM: selftests: Add ENCLS_EXITING_BITMAP{,HIGH} VMCS fields

KVM: selftests: Add ENCLS_EXITING_BITMAP{,HIGH} VMCS fields

The updated Enlightened VMCS definition has 'encls_exiting_bitmap'
field which needs mapping to VMCS, add the missing encoding.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220830133737.1539624-13-vkuznets@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>