OvmfPkg/SmbiosPlatformDxe: create Xen-specific module INF file

"OvmfPkg/SmbiosPlatformDxe" is structured somewhat differently from the
drivers duplicated and trimmed thus far in this series. The final QEMU and
Xen versions will share a relatively significant amount of code, therefore
duplicating the whole driver is less useful, even temporarily. Instead,
duplicate the INF file, in preparation for customizing the entry point
function.

Because ArmVirtXen doesn't actually include OvmfPkg/SmbiosPlatformDxe [*],
there is only one platform that's supposed to consume the new driver:
OvmfXen. Switch OvmfXen to the new driver at once.

[*] See commit 164cf40383 ("OvmfPkg: SmbiosPlatformDxe: restrict current
    Xen code to IA32/X64", 2015-07-26).

This patch is best viewed with "git show --find-copies-harder".

Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien@xen.org>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2122
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20210526201446.12554-42-lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

OvmfPkg/OvmfXen.dsc

@@ -645,7 +645,7 @@
     <LibraryClasses>
       NULL|OvmfPkg/Library/SmbiosVersionLib/DetectSmbiosVersionLib.inf
   }
-  OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+  OvmfPkg/SmbiosPlatformDxe/XenSmbiosPlatformDxe.inf
 
   #
   # ACPI Support

OvmfPkg/OvmfXen.fdf

@@ -348,7 +348,7 @@ INF  MdeModulePkg/Bus/Pci/PciSioSerialDxe/PciSioSerialDxe.inf
 INF  MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KeyboardDxe.inf
 
 INF  MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
-INF  OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+INF  OvmfPkg/SmbiosPlatformDxe/XenSmbiosPlatformDxe.inf
 
 INF  MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
 INF  OvmfPkg/XenAcpiPlatformDxe/XenAcpiPlatformDxe.inf

OvmfPkg/SmbiosPlatformDxe/XenSmbiosPlatformDxe.inf

@@ -0,0 +1,66 @@
+## @file
+#  This driver installs SMBIOS information for OVMF on Xen
+#
+#  Copyright (C) 2021, Red Hat, Inc.
+#  Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+#  Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = XenSmbiosPlatformDxe
+  FILE_GUID                      = c41f0579-5598-40f1-95db-3983c8ebbe2a
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+
+  ENTRY_POINT                    = SmbiosTablePublishEntry
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC ARM AARCH64
+#
+
+[Sources]
+  Qemu.c
+  SmbiosPlatformDxe.c
+  SmbiosPlatformDxe.h
+  XenSmbiosPlatformDxe.h
+
+[Sources.IA32, Sources.X64]
+  X86Xen.c
+
+[Sources.ARM, Sources.AARCH64]
+  ArmXen.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+  DebugLib
+  MemoryAllocationLib
+  PcdLib
+  QemuFwCfgLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[LibraryClasses.IA32, LibraryClasses.X64]
+  BaseLib
+  HobLib
+
+[Pcd]
+  gUefiOvmfPkgTokenSpaceGuid.PcdQemuSmbiosValidated
+
+[Protocols]
+  gEfiSmbiosProtocolGuid                      # PROTOCOL ALWAYS_CONSUMED
+
+[Guids.IA32, Guids.X64]
+  gEfiXenInfoGuid
+
+[Depex]
+  gEfiSmbiosProtocolGuid
+