[CPU] Refactor CPU WNA16 (#28826)

Signed-off-by: jiang1.li <jiang1.li@intel.com>

vllm/model_executor/layers/quantization/ipex_quant.py

@@ -134,7 +134,7 @@ class IPEXConfig(QuantizationConfig):
     def override_quantization_method(
         cls, hf_quant_cfg, user_quant
     ) -> QuantizationMethods | None:
-        if not current_platform.is_cpu() and not current_platform.is_xpu():
+        if not current_platform.is_xpu():
             return None
 
         quant_method = hf_quant_cfg.get("quant_method", "").lower()