[patch] MdePkg: Fix incorrect check for DisplayOnly text format in AcpiEx

[Dandan Bi <dandan.bi@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1312

Text format for AcpiEx device path in UEFI Spec:
AcpiEx(HID,CID,UID,HIDSTR,CIDSTR,UIDSTR)
AcpiEx(HID|HIDSTR,(CID|CIDSTR,UID|UIDSTR))(Display Only)

When convert device path to text for ACPI device path,
current code check AllowShortcuts parameter to convert
the device path to DisplayOnly text format(shorter text
representation) by mistake.
It should check DisplayOnly parameter.

This commit is to fix this issue.

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 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
---
 MdePkg/Library/UefiDevicePathLib/DevicePathToText.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathToText.c b/MdePkg/Library/UefiDevicePathLib/DevicePathToText.c
index cdcdb3623a..97d279eeb2 100644
--- a/MdePkg/Library/UefiDevicePathLib/DevicePathToText.c
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathToText.c
@@ -495,11 +495,11 @@ DevPathToTextAcpiEx (
         CIDText,
         UIDStr
        );
     }
   } else {
-    if (AllowShortcuts) {
+    if (DisplayOnly) {
       //
       // display only
       //
       if (AcpiEx->HID == 0) {
         UefiDevicePathLibCatPrint (Str, L"AcpiEx(%a,", HIDStr);
-- 
2.18.0.windows.1