Reuse loop op lowering, add comment.

Author: jsjodin

flang/lib/Lower/OpenMP/OpenMP.cpp

@@ -3525,7 +3525,7 @@ static void genOMPDispatch(lower::AbstractConverter &converter,
     break;
   case llvm::omp::Directive::OMPD_tile:
     newOp =
-        genTiledLoopOp(converter, symTable, semaCtx, eval, loc, queue, item);
+        genLoopOp(converter, symTable, semaCtx, eval, loc, queue, item);
     break;
   case llvm::omp::Directive::OMPD_unroll:
     genUnrollOp(converter, symTable, stmtCtx, semaCtx, eval, loc, queue, item);