Fixing circular import after rebasing error

Author: axiotisk

hls4ml/backends/__init__.py

@@ -6,11 +6,12 @@
 from hls4ml.backends.vivado_accelerator.vivado_accelerator_backend import VivadoAcceleratorBackend
 from hls4ml.backends.vivado_accelerator.vivado_accelerator_config import VivadoAcceleratorConfig  # noqa: F401
 
+from hls4ml.backends.vitis.vitis_backend import VitisBackend  # isort: skip
+
 #[K] start
 from hls4ml.backends.vitis_accelerator.vitis_accelerator_backend import VitisAcceleratorBackend
 from hls4ml.backends.vitis_accelerator.vitis_accelerator_config import VitisAcceleratorConfig
-
-from hls4ml.backends.vitis.vitis_backend import VitisBackend  # isort: skip
+#[K] end
 
 register_backend('Vivado', VivadoBackend)
 register_backend('VivadoAccelerator', VivadoAcceleratorBackend)