UefiCpuPkg/CpuFeature: reduce time complexty to calc CpuInfo.First

UefiCpuPkg/CpuFeature: reduce time complexty to calc CpuInfo.First

CpuInfo.First stores whether the current thread belongs to the first
package in the platform, first core in a package, first thread in a
core.

But the time complexity of original algorithm to calculate the
CpuInfo.First is O (n) * O (p) * O (c).
  n: number of processors
  p: number of packages
  c: number of cores per package

The patch trades time with space by storing the first package, first
core per package, first thread per core in an array.
The time complexity becomes O (n).

Signed-off-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Cc: Yun Lou <yun.lou@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>