DynamicTablesPkg: AcpiSsdtPcieLibArm: Create support library

Add support library to allow for customization of _OSC and slot info.
The functions in the library are unchanged,
with the exception of adding PciInfo pointer to the APIs.

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

DynamicTablesPkg/Library/Common/SsdtPcieSupportLib/SsdtPcieSupportLibPrivate.h

@@ -0,0 +1,25 @@
+/** @file
+  SSDT PCIe Support Library private data.
+
+  Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Reference(s):
+  - PCI Firmware Specification - Revision 3.0
+  - ACPI 6.4 specification:
+   - s6.2.13 "_PRT (PCI Routing Table)"
+   - s6.1.1 "_ADR (Address)"
+  - linux kernel code
+  - Arm Base Boot Requirements v1.0
+**/
+
+#ifndef SSDT_PCIE_SUPPORT_LIB_PRIVATE_H_
+#define SSDT_PCIE_SUPPORT_LIB_PRIVATE_H_
+
+/** C array containing the compiled AML template.
+    This symbol is defined in the auto generated C file
+    containing the AML bytecode array.
+*/
+extern CHAR8  ssdtpcieosctemplate_aml_code[];
+
+#endif // SSDT_PCIE_SUPPORT_LIB_PRIVATE_H_