[Test] fix failing test_layer_streaming_maxpool_batch

tests/fpgadataflow/test_layer_streaming_maxpool_batch.py

@@ -7,6 +7,7 @@ from finn.core.modelwrapper import ModelWrapper
 from finn.transformation.fpgadataflow.cleanup import CleanUp
 from finn.transformation.fpgadataflow.codegen_npysim import CodeGen_npysim
 from finn.transformation.fpgadataflow.compile import Compile
+from finn.transformation.fpgadataflow.set_sim_mode import SetSimMode
 
 
 def test_layer_streaming_maxpool_batch():
@@ -112,6 +113,7 @@ def test_layer_streaming_maxpool_batch():
     ).reshape(2, 2, 4, 4)
     print(input_tensor)
 
+    model = model.transform(SetSimMode("npysim"))
     model = model.transform(CodeGen_npysim())
     model = model.transform(Compile())