MdeModulePkg: AcpiTableDxe: make 4 GB table allocation limit optional

AARCH64 systems never require compatibility with legacy ACPI OSes, and
may not have any 32-bit addressable system RAM. To support ACPI on these
systems, we need to be able to relax the 4 GB allocation restriction.

So add a PCD PcdAcpiExposedTableVersions containing a bitmask describing
which ACPI versions are targeted, and wire it up it up to the memory
allocation calls in AcpiTableDxe/AcpiTableProtocol.c. I.e., if ACPI v1.0b
is not among the supported versions, the memory allocations are not limited
to 4 GB, and only table types that carry 64-bit addresses are emitted.

Note that this will inhibit the publishing of any tables that carry only
32-bit addresses, i.e., RSDPv1, RSDTv1 and RSDTv3.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf

@@ -2,6 +2,7 @@
 #  ACPI Table Protocol Driver
 #
 #  Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
 #  This program and the accompanying materials are
 #  licensed and made available under the terms and conditions of the BSD License
 #  which accompanies this distribution.  The full text of the license may be found at
@@ -67,6 +68,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiDefaultOemRevision      ## CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiDefaultCreatorId        ## CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiDefaultCreatorRevision  ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiExposedTableVersions    ## CONSUMES
 
 [Protocols]
   gEfiAcpiTableProtocolGuid                     ## PRODUCES