[hardware] unify usage of is_tpu to current_platform.is_tpu() (#7102)

vllm/config.py

@@ -10,11 +10,12 @@ import vllm.envs as envs
 from vllm.logger import init_logger
 from vllm.model_executor.layers.quantization import QUANTIZATION_METHODS
 from vllm.model_executor.models import ModelRegistry
+from vllm.platforms import current_platform
 from vllm.tracing import is_otel_installed
 from vllm.transformers_utils.config import get_config, get_hf_text_config
 from vllm.utils import (STR_NOT_IMPL_ENC_DEC_CUDAGRAPH, GiB_bytes,
                         cuda_device_count_stateless, get_cpu_memory, is_cpu,
-                        is_hip, is_neuron, is_openvino, is_tpu, is_xpu,
+                        is_hip, is_neuron, is_openvino, is_xpu,
                         print_warning_once)
 
 if TYPE_CHECKING:
@@ -282,7 +283,7 @@ class ModelConfig:
                 raise ValueError(
                     f"{self.quantization} quantization is currently not "
                     f"supported in ROCm.")
-            if is_tpu(
+            if current_platform.is_tpu(
             ) and self.quantization not in tpu_supported_quantization:
                 raise ValueError(
                     f"{self.quantization} quantization is currently not "
@@ -910,7 +911,7 @@ class DeviceConfig:
                 self.device_type = "neuron"
             elif is_openvino():
                 self.device_type = "openvino"
-            elif is_tpu():
+            elif current_platform.is_tpu():
                 self.device_type = "tpu"
             elif is_cpu():
                 self.device_type = "cpu"