New CPU models still carried over qemu64's notion of gluing
AMD defined (yet Intel undefined) feature flags in the corresponding
Intel model definitions.
Potential confusion of a guest and documented confusion of users
and developers. qemu64 has been getting by with this speculative
hybrid encoding scheme but we should as accurate as possible for
specific CPU archirecture definitions.
Remove the AMD defined flags for Intel models.
Reduced potential for guest bugs and user confusion.