[OpenACC][CIR] Fix build error from CIR upstreaming

- 'DeviceTypeArgument' is defined as 'IdentifierLoc' instead of
  'std::pair<IdentifierInfo *, SourceLocation>'.

Author: darkbuck

clang/lib/CIR/CodeGen/CIRGenStmtOpenACC.cpp

@@ -124,7 +124,7 @@ class OpenACCClauseCIREmitter final
 
       for (const DeviceTypeArgument &arg : clause.getArchitectures()) {
         deviceTypes.push_back(mlir::acc::DeviceTypeAttr::get(
-            builder.getContext(), decodeDeviceType(arg.first)));
+            builder.getContext(), decodeDeviceType(arg.getIdentifierInfo())));
       }
       operation.removeDeviceTypesAttr();
       operation.setDeviceTypesAttr(
@@ -135,7 +135,7 @@ class OpenACCClauseCIREmitter final
 
       if (!clause.getArchitectures().empty())
         operation.setDeviceType(
-            decodeDeviceType(clause.getArchitectures()[0].first));
+            decodeDeviceType(clause.getArchitectures()[0].getIdentifierInfo()));
     } else {
       return clauseNotImplemented(clause);
     }