x86/vtx: Fixes to Haswell/Broadwell LBR TSX errata

x86/vtx: Fixes to Haswell/Broadwell LBR TSX errata

Cross reference and list all errata, now that they are published.

These errata are specific to Haswell/Broadwell.  They should have model and
vendor checks, as Intel isn't the only vendor to implement VT-x.

All affected models use the same MSR indicies, so these can be hard coded
rather than looking up and storing constant values.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Release-acked-by: Juergen Gross <jgross@suse.com>