MdePkg: Add PciRoot/PcieRoot text for ACPI Expanded Device Path

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1228

According to UEFI spec,for ACPI Expanded Device Path
when HID=PNP0A03 or CID=PNP0A03 and HID != PNP0A08,
the device path node can be displayed as: PciRoot(UID|UIDSTR)
When HID=PNP0A08 or CID=PNP0A08, the device path node can be
displayed as: PcieRoot(UID|UIDSTR). But current code miss the
code logic.

This commit is to do the enhancement.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

MdePkg/Library/UefiDevicePathLib/DevicePathToText.c

@@ -433,6 +433,27 @@ DevPathToTextAcpiEx (
   UIDStr = HIDStr + AsciiStrLen (HIDStr) + 1;
   CIDStr = UIDStr + AsciiStrLen (UIDStr) + 1;
 
+  if (DisplayOnly) {
+    if ((EISA_ID_TO_NUM (AcpiEx->HID) == 0x0A03) ||
+        (EISA_ID_TO_NUM (AcpiEx->CID) == 0x0A03 && EISA_ID_TO_NUM (AcpiEx->HID) != 0x0A08)) {
+      if (AcpiEx->UID == 0) {
+        UefiDevicePathLibCatPrint (Str, L"PciRoot(%a)", UIDStr);
+      } else {
+        UefiDevicePathLibCatPrint (Str, L"PciRoot(0x%x)", AcpiEx->UID);
+      }
+      return;
+    }
+
+    if (EISA_ID_TO_NUM (AcpiEx->HID) == 0x0A08 || EISA_ID_TO_NUM (AcpiEx->CID) == 0x0A08) {
+      if (AcpiEx->UID == 0) {
+        UefiDevicePathLibCatPrint (Str, L"PcieRoot(%a)", UIDStr);
+      } else {
+        UefiDevicePathLibCatPrint (Str, L"PcieRoot(0x%x)", AcpiEx->UID);
+      }
+      return;
+    }
+  }
+
   //
   // Converts EISA identification to string.
   //