OvmfPkg: build CpuS3DataDxe for -D SMM_REQUIRE

OvmfPkg: build CpuS3DataDxe for -D SMM_REQUIRE

The PiSmmCpuDxeSmm driver from UefiCpuPkg depends on the ACPI_CPU_DATA
structure -- created by a platform- and CPU-specific driver -- in order to
support ACPI S3. The address of this structure is communicated through the
dynamic PCD PcdCpuS3DataAddress.

The "UefiCpuPkg/Include/AcpiCpuData.h" header file documents the fields of
this structure in detail.

The simple/generic "UefiCpuPkg/CpuS3DataDxe" driver creates and populates
the structure in a conformant way, and it co-operates well with
PiSmmCpuDxeSmm, for OVMF's purposes.

         PlatformBdsLib  CpuS3DataDxe     PiSmmCpuDxeSmm    S3Resume2Pei
         (DXE_DRIVER)    (DXE_DRIVER)     (DXE_SMM_DRIVER)  (PEIM)
         --------------  ---------------  ----------------  --------------
normal                   collects data
boot                     except MTRR
                         settings into
                         ACPI_CPU_DATA

                         sets
                         PcdCpuS3Da...

         signals
         End-of-Dxe
            |
            +----------> collects MTRR
                         settings into
                         ACPI_CPU_DATA

         installs
         [Dxe]Smm
         ReadyToLock
            |
            +---------------------------> fetches
                                          PcdCpuS3Dat...

                                          copies
                                          ACPI_CPU_DATA
                                          into SMRAM

runtime

S3
suspend

S3                                                          transfers
resume                                                      control to
                                                            PiSmmCpuDxe...
                                                                |
                                          uses             <----+
                                          ACPI_CPU_DATA
                                          from SMRAM

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19060 6f19259b-4bc3-4df7-8a09-765794883524