[BugFix] Fix `AttributeError: 'MergedColumnParallelLinear' object has no...

[BugFix] Fix `AttributeError: 'MergedColumnParallelLinear' object has no attribute 'weight_scale'` (#30399)
Signed-off-by: Lucas Wilkinson <lwilkins@redhat.com>

vllm/model_executor/warmup/deep_gemm_warmup.py

@@ -89,7 +89,7 @@ def _extract_data_from_linear_base_module(
     assert m.quant_method.quant_config is not None
 
     w = m.weight
-    ws = m.weight_scale
+    ws = m.weight_scale_inv if hasattr(m, "weight_scale_inv") else m.weight_scale
     quant_block_size = m.quant_method.quant_config.weight_block_size
 
     assert isinstance(w, torch.Tensor)