Revert "[MLIR][emitc]: Remove unused functions (NFC)"

This reverts commit c4f8da9.

Author: jorickert

mlir/lib/Dialect/EmitC/IR/EmitC.cpp

@@ -1043,6 +1043,27 @@ LogicalResult emitc::VerbatimOp::verify() {
   return success();
 }
 
+[[maybe_unused]] static ParseResult
+parseVariadicTypeFmtArgs(AsmParser &p, SmallVector<Type> &params) {
+  Type type;
+  if (p.parseType(type))
+    return failure();
+
+  params.push_back(type);
+  while (succeeded(p.parseOptionalComma())) {
+    if (p.parseType(type))
+      return failure();
+    params.push_back(type);
+  }
+
+  return success();
+}
+
+[[maybe_unused]] static void printVariadicTypeFmtArgs(AsmPrinter &p,
+                                                      ArrayRef<Type> params) {
+  llvm::interleaveComma(params, p, [&](Type type) { p.printType(type); });
+}
+
 FailureOr<SmallVector<ReplacementItem>> emitc::VerbatimOp::parseFormatString() {
   // Error checking is done in verify.
   return ::parseFormatString(getValue(), getFmtArgs());