MdeModulePkg: Add EDKII_PCI_DEVICE_PPI definition

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3907

This commit introduces EDKII_PCI_DEVICE_PPI. The purpose of this PPI is
to provide a way of accessing PCI devices to drvice drivers such as
NvmExpressPei or AhciPei.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Maciej Czajkowski <maciej.czajkowski@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

MdeModulePkg/Include/Ppi/PciDevice.h

@@ -0,0 +1,32 @@
+/** @file
+
+  Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EDKII_PCI_DEVICE_PPI_H_
+#define EDKII_PCI_DEVICE_PPI_H_
+
+#include <Protocol/PciIo.h>
+#include <Protocol/DevicePath.h>
+
+///
+/// Global ID for the EDKII_PCI_DEVICE_PPI_GUID.
+///
+#define EDKII_PCI_DEVICE_PPI_GUID \
+  { \
+    0x1597ab4f, 0xd542, 0x4efe, { 0x9a, 0xf7, 0xb2, 0x44, 0xec, 0x54, 0x4c, 0x0b } \
+  }
+
+///
+/// PCI Device PPI structure.
+///
+typedef struct {
+  EFI_PCI_IO_PROTOCOL         PciIo;
+  EFI_DEVICE_PATH_PROTOCOL    *DevicePath;
+} EDKII_PCI_DEVICE_PPI;
+
+extern EFI_GUID  gEdkiiPeiPciDevicePpiGuid;
+
+#endif // EDKII_PCI_DEVICE_PPI_H_