vlm: support piecewise cuda graph for Kimi-K2.5 (#20747)

python/sglang/srt/models/kimi_k25.py

@@ -716,6 +716,8 @@ class KimiK25ForConditionalGeneration(nn.Module):
             ),
         )
 
+        self.model = self.language_model.model
+
         # Ensure that the dtype of the vision_tower and mm_projector matches that of the language_model.
         # This solves the dtype mismatch issue when using device_map="auto" and torch_dtype.
         if hasattr(self.language_model, "dtype"):