misc: Collapse all uses of DTRACE(x) to Debug::x.

Also mark the DTRACE macro as deprecated.

Change-Id: I99d9a9544b539117b375186e3e425d73d3c5cab7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45009
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>

src/cpu/simple/base.cc

@@ -246,7 +246,7 @@ BaseSimpleCPU::wakeup(ThreadID tid)
 void
 BaseSimpleCPU::traceFault()
 {
-    if (DTRACE(ExecFaulting)) {
+    if (Debug::ExecFaulting) {
         traceData->setFaulting(true);
     } else {
         delete traceData;