UefiCpuPkg: Add ResetVector/OldVtf

This implements the old VTF header often used on EDK II
IA32 & X64 products.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
OldVtf WIP

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>