UefiCpuPkg/MicrocodeUpdate: Add MicrocodeUpdate component.

UefiCpuPkg/MicrocodeUpdate: Add MicrocodeUpdate component.

MicrocodeUpdate supports update Microcode region via UEFI FMP capsule.

MicrocodeUpdate SetImage() will perform the Microcode version,
ProcessorSignature/ProcessorFlag, and try to load microcode.
If and only if the Microcode is loaded successfully, and new Microcode
will be updated to system flash region.

Cc: Jeff Fan <jeff.fan@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>