[tests] Mark cybsec board tests as xfail

tests/end2end/test_end2end_cybsec_mlp.py

@@ -229,6 +229,7 @@ def test_end2end_cybsec_mlp_build(QONNX_export):
 
 
 @pytest.mark.end2end
+@pytest.mark.xfail
 @pytest.mark.parametrize("QONNX_export", [False, True])
 def test_end2end_cybsec_mlp_run_on_hw(QONNX_export):
     build_env = get_build_env(build_kind, target_clk_ns)