DynamicTablesPkg: IORT generator updates for Rev E.d spec

Bugzilla: 3458 - Add support IORT Rev E.d specification updates
          (https://bugzilla.tianocore.org/show_bug.cgi?id=3458)

The IO Remapping Table, Platform Design Document, Revision E.d,
Feb 2022 (https://developer.arm.com/documentation/den0049/)
introduces the following updates, collectively including the
updates and errata fixes to Rev E, Rev E.a, Rev E.b, Rev E.c:
 - increments the IORT table revision to 5.
 - updates the node definition to add an 'Identifier' field.
 - adds definition of node type 6 - Reserved Memory Range node.
 - adds definition for Memory Range Descriptors.
 - adds flag to indicate PRI support for root complexes.
 - adds flag to indicate if the root complex supports forwarding
   of PASID information on translated transactions to the SMMU.
 - adds flag to indicate if the root complex supports PASID.
 - adds flags to define access privilege and attributes for the
   memory ranges.

Therefore, update the IORT generator to:
  - increment IORT table revision count to 5.
  - populate Identifier filed if revision is greater than 4.
  - add support to populate Reserved Memory Range nodes and
    the Memory range descriptors.
  - add validation to check that the Identifier field is
    unique.
  - Populate the PASID capabilities and Flags field of the
    Root complex node.
 - Added checks to not generate IORT Rev E, Rev E.<a,b,c>.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>

DynamicTablesPkg/Library/Acpi/Arm/AcpiIortLibArm/IortGenerator.h

@@ -1,6 +1,6 @@
 /** @file
 
-  Copyright (c) 2018, ARM Limited. All rights reserved.
+  Copyright (c) 2018 - 2022, Arm Limited. All rights reserved.
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -25,6 +25,9 @@ typedef struct IortNodeIndexer {
   VOID               *Object;
   /// Node offset from the start of the IORT table
   UINT32             Offset;
+
+  /// Unique identifier for the Node
+  UINT32             Identifier;
 } IORT_NODE_INDEXER;
 
 typedef struct AcpiIortGenerator {