SourceLevelDebugPkg: Change use of EFI_D_* to DEBUG_*

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3739

Update all use of EFI_D_* defines in DEBUG() macros to DEBUG_* defines.

Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

SourceLevelDebugPkg/Library/DebugCommunicationLibSerialPort/DebugCommunicationLibSerialPort.c

@@ -59,7 +59,7 @@ DebugPortInitialize (
 
   Status = SerialPortInitialize ();
   if (RETURN_ERROR(Status)) {
-    DEBUG ((EFI_D_ERROR, "Debug Serial Port: Initialization failed!\n"));
+    DEBUG ((DEBUG_ERROR, "Debug Serial Port: Initialization failed!\n"));
   }
 
   if (Function != NULL) {
@@ -151,4 +151,3 @@ DebugPortPollBuffer (
 {
   return SerialPortPoll ();
 }
-