ArmVirtPkg/FdtPciPcdProducerLib: Relocate PciPcdProducerLib to OvmfPkg

Relocate PciPcdProducerLib to OvmfPkg/Fdt, this library is
leverage by both ARM and RISC-V archs.

Add OvmfPkg/Fdt maintainers in Maintainers.txt

Signed-off-by: Abner Chang <abner.chang@hpe.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Schaefer <daniel.schaefer@hpe.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Daniel Schaefer <daniel.schaefer@hpe.com>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>

OvmfPkg/Fdt/FdtPciPcdProducerLib/FdtPciPcdProducerLib.inf

@@ -0,0 +1,42 @@
+#/** @file
+#  FDT client library for consumers of PCI related dynamic PCDs
+#
+#  Copyright (c) 2016, Linaro Ltd. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = FdtPciPcdProducerLib
+  FILE_GUID                      = D584275B-BF1E-4DF8-A53D-980F5645C5E7
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = PciPcdProducerLib|DXE_DRIVER UEFI_DRIVER
+  CONSTRUCTOR                    = FdtPciPcdProducerLibConstructor
+
+[Sources]
+  FdtPciPcdProducerLib.c
+
+[Packages]
+  EmbeddedPkg/EmbeddedPkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  PcdLib
+  UefiBootServicesTableLib
+
+[Protocols]
+  gFdtClientProtocolGuid                                      ## CONSUMES
+
+[Pcd]
+  gEfiMdePkgTokenSpaceGuid.PcdPciIoTranslation                ## PRODUCES
+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress           ## PRODUCES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration  ## PRODUCES
+
+[Depex]
+  gFdtClientProtocolGuid