UefiCpuPkg/CpuMpPei: Find available memory < 1MB for AP reset code

UefiCpuPkg/CpuMpPei: Find available memory < 1MB for AP reset code

Search memory resource HOB list to find one available system memory under 1MB
for AP reset code and exchange information between BSP and APs.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17989 6f19259b-4bc3-4df7-8a09-765794883524