[SSP][NFC] Opt-out of MLIR properties for attributes for now.

include/circt/Dialect/SSP/SSP.td

@@ -31,6 +31,10 @@ def SSPDialect : Dialect {
   let cppNamespace = "::circt::ssp";
 
   let useDefaultAttributePrinterParser = true;
+
+  // Opt-out of properties for now, must migrate by LLVM 19.  #5273.
+  let usePropertiesForAttributes = 0;
+
   let extraClassDeclaration = [{
     /// Register all SSP attributes.
     void registerAttributes();