OvmfPkg: Copy the required CSM components from framework packages

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1811

This commit copies the exact:

Drivers:
* VideoDxe
* LegacyBiosDxe

Libraries:
* LegacyBootMaintUiLib
* LegacyBootManagerLib

Guid header files:
* Legacy Bios Guid
* LegacyDevOrder Guid

Protocol header files:
* Firmware Volume Protocol
* ISA ACPI Protocol
* ISA I/O Protocol
* Legacy BIOS Protocol
* Legacy BIOS Platform Protocol
* Legacy Interrupt Protocol
* VGA Mini Port Protocol

Framework header files (within IntelFrameworkPkg):
* FrameworkDxe.h
* Framework/BootScript.h
* Framework/DxeCis.h
* Framework/FirmwareVolumeHeader.h
* Framework/FirmwareVolumeImageFormat.h
* Framework/FrameworkInternalFormRepresentation.h
* Framework/Hob.h
* Framework/StatusCode.h

from IntelFramework[Module]Pkg to OvmfPkg/Csm/ folder.

Cc: Ray Ni <ray.ni@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: David Woodhouse <dwmw2@infradead.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

OvmfPkg/Csm/LegacyBootManagerLib/LegacyBootManagerLib.inf

@@ -0,0 +1,58 @@
+## @file
+#  Legacy Boot Manager module is library for BDS phase.
+#
+#  Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = LegacyBootManagerLib
+  MODULE_UNI_FILE                = LegacyBootManagerLib.uni
+  FILE_GUID                      = F1B87BE4-0ACC-409A-A52B-7BFFABCC96A0
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = NULL|DXE_DRIVER UEFI_APPLICATION
+  CONSTRUCTOR                    = LegacyBootManagerLibConstructor
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  LegacyBm.c
+  InternalLegacyBm.h
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  IntelFrameworkPkg/IntelFrameworkPkg.dec
+  IntelFrameworkModulePkg/IntelFrameworkModulePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  UefiBootServicesTableLib
+  UefiRuntimeServicesTableLib
+  DevicePathLib
+  MemoryAllocationLib
+  UefiLib
+  DebugLib
+  PrintLib
+  PerformanceLib
+  UefiBootManagerLib
+
+[Guids]
+  gEfiGlobalVariableGuid                        ## SOMETIMES_PRODUCES ## Variable:L"Boot####" (Boot option variable)
+                                                ## SOMETIMES_CONSUMES ## Variable:L"BootOrder" (The boot option array)
+  gEfiLegacyDevOrderVariableGuid
+
+[Protocols]
+  gEfiLegacyBiosProtocolGuid                    ## SOMETIMES_CONSUMES
+
+[FeaturePcd]
+
+[Pcd]