[Hardware][ROCM] using current_platform.is_rocm (#9642)

Signed-off-by: wangshuai09 <391746016@qq.com>

vllm/model_executor/layers/quantization/utils/w8a8_utils.py

@@ -4,16 +4,16 @@ import torch
 
 from vllm import _custom_ops as ops
 from vllm.platforms import current_platform
-from vllm.utils import is_hip
 
 # Input scaling factors are no longer optional in _scaled_mm starting
 # from pytorch 2.5. Allocating a dummy tensor to pass as input_scale
-TORCH_DEVICE_IDENTITY = torch.ones(1).cuda() if is_hip() else None
+TORCH_DEVICE_IDENTITY = torch.ones(1).cuda() \
+            if current_platform.is_rocm() else None
 
 
 def cutlass_fp8_supported() -> bool:
     # cutlass is not supported on Rocm
-    if is_hip():
+    if current_platform.is_rocm():
         return False
 
     capability_tuple = current_platform.get_device_capability()