[misc] error early for old-style class (#10304)

Signed-off-by: youkaichao <youkaichao@gmail.com>

vllm/model_executor/models/fuyu.py

@@ -225,7 +225,7 @@ def input_mapper_for_fuyu(ctx: InputContext, data: object):
 @INPUT_REGISTRY.register_input_processor(input_processor_for_fuyu)
 class FuyuForCausalLM(nn.Module, SupportsMultiModal, SupportsPP):
 
-    def __init__(self, vllm_config: VllmConfig, prefix: str = "") -> None:
+    def __init__(self, *, vllm_config: VllmConfig, prefix: str = ""):
         super().__init__()
         config = vllm_config.model_config.hf_config
         quant_config = vllm_config.quant_config