UefiCpuPkg/PiSmmCpuDxeSmm: Using MSRs semaphores in aligned buffer

UefiCpuPkg/PiSmmCpuDxeSmm: Using MSRs semaphores in aligned buffer

Update MSRs semaphores to the ones in allocated aligned semaphores
buffer. If MSRs semaphores is not enough, allocate one page more.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
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: Michael Kinney <michael.d.kinney@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>