Fix infinite recursive search issue in quark.py (#32779)

Signed-off-by: Yanwen Lin <lyw1124278064@gmail.com>
Signed-off-by: Xiao Yu <xiao.yu.dc@outlook.com>
Signed-off-by: kimheesu <wlskaka4@gmail.com>
Co-authored-by: Yanwen Lin <lyw1124278064@gmail.com>
Co-authored-by: Kim Hee Su <wlskaka4@gmail.com>

vllm/model_executor/layers/quantization/quark/quark.py

@@ -467,10 +467,17 @@ class QuarkConfig(QuantizationConfig):
                 layer_name.replace(proj_name, shard_proj_name)
                 for shard_proj_name in shard_proj_names
             ]
-            shard_configs = [
-                self._find_matched_config(shard_name, module)
-                for shard_name in shard_names
-            ]
+
+            shard_configs = []
+            for shard_name in shard_names:
+                if shard_name == layer_name:
+                    config = cast(
+                        dict[str, Any], self.quant_config.get("global_quant_config")
+                    )
+                else:
+                    config = self._find_matched_config(shard_name, module)
+                shard_configs.append(config)
+
             if not all(
                 deep_compare(q_config, shard_configs[0]) for q_config in shard_configs
             ):