Revert "No support for double nested 64 bit guest using VCDriver"

This reverts commit b5aa274aee82184b2a938865d714e84067c2e800.
Revert "Revert "No support for double nested 64 bit guest using VCDriver""

This reverts commit 64bd15e6c33b83ba3ae8073ac455ce4e65a42923.