Include only the nnet_helpers.h header (avoid multiple definition)

Author: GiuseppeDiGuglielmo

hls4ml/writer/vivado_accelerator_writer.py

@@ -92,7 +92,7 @@ def write_axi_wrapper(self, model):
                 for b in model_brams:
                     newline += '#include "weights/{}.h"\n'.format(b.name)
                 newline += '\n'
-                newline += '#include "parameters.h"\n'
+                newline += '#include "nnet_utils/nnet_helpers.h"\n'
             elif '//hls-fpga-machine-learning insert local vars' in line:
                 newline = ''
                 if self.vivado_accelerator_config.get_interface() == 'axi_stream':