UefiCpuPkg/MtrrLib: Use a better algorithm to calculate MTRR

UefiCpuPkg/MtrrLib: Use a better algorithm to calculate MTRR

The new algorithm finds out the more optimal MTRR solution for
current memory type settings.
Compare against the original algorithm, the new one guarantees
to find the correct MTRR solution, but doesn't guarantee to
find the most optimal MTRR solution.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>