Skip rescale rwkv linear when load_low_bit (#10164)

* rwkv_ld

python/llm/src/bigdl/llm/transformers/model.py

@@ -561,6 +561,10 @@ class _BaseAutoModelClass:
         else:
             model = model_class(config, *model_args, **kwargs)
 
+        # rwkv model linear layers has been rescaled
+        if model.config.model_type == "rwkv":
+            model.layers_are_rescaled = True
+
         # Loading args may differ based on their usage
         quant_device = "meta" if bigdl_lcmu_enabled else "cpu"
         model = ggml_convert_low_bit(model, qtype, optimize_model, device=quant_device,