[Bugfix] Allow to enable HSDP alone (#1567)

Signed-off-by: gcanlin <canlinguosdu@gmail.com>

vllm_omni/diffusion/worker/diffusion_worker.py

@@ -125,6 +125,7 @@ class DiffusionWorker:
                 tensor_parallel_size=parallel_config.tensor_parallel_size,
                 pipeline_parallel_size=parallel_config.pipeline_parallel_size,
                 fully_shard_degree=parallel_config.hsdp_shard_size if parallel_config.use_hsdp else 1,
+                hsdp_replicate_size=parallel_config.hsdp_replicate_size if parallel_config.use_hsdp else 1,
             )
             init_workspace_manager(self.device)