[Hexagon] Use the correct call to detect debug instructions (#83373)

Author: Sumanth Gundapaneni

llvm/lib/Target/Hexagon/HexagonBitSimplify.cpp

@@ -1002,7 +1002,7 @@ namespace {
 bool DeadCodeElimination::isDead(unsigned R) const {
   for (const MachineOperand &MO : MRI.use_operands(R)) {
     const MachineInstr *UseI = MO.getParent();
-    if (UseI->isDebugValue())
+    if (UseI->isDebugInstr())
       continue;
     if (UseI->isPHI()) {
       assert(!UseI->getOperand(0).getSubReg());

llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp

@@ -1180,7 +1180,7 @@ void HexagonPacketizerList::unpacketizeSoloInstrs(MachineFunction &MF) {
       bool InsertBeforeBundle;
       if (MI.isInlineAsm())
         InsertBeforeBundle = !hasWriteToReadDep(MI, *BundleIt, HRI);
-      else if (MI.isDebugValue())
+      else if (MI.isDebugInstr())
         InsertBeforeBundle = true;
       else
         continue;