UefiCpuPkg/PiSmmCpuDxeSmm: Move forward MP sync data initialization

UefiCpuPkg/PiSmmCpuDxeSmm: Move forward MP sync data initialization

Move MP sync data initialization in front of the place that initialize
page table, because the page fault spin lock is allocated in
InitializeMpSyncData() while it is initialized in SmmInitPageTable().

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>