[Hardware][openvino] is_openvino --> current_platform.is_openvino (#9716)

vllm/platforms/interface.py

@@ -11,6 +11,7 @@ class PlatformEnum(enum.Enum):
     XPU = enum.auto()
     CPU = enum.auto()
     NEURON = enum.auto()
+    OPENVINO = enum.auto()
     UNSPECIFIED = enum.auto()
 
 
@@ -52,6 +53,9 @@ class Platform:
     def is_neuron(self) -> bool:
         return self._enum == PlatformEnum.NEURON
 
+    def is_openvino(self) -> bool:
+        return self._enum == PlatformEnum.OPENVINO
+
     def is_cuda_alike(self) -> bool:
         """Stateless version of :func:`torch.cuda.is_available`."""
         return self._enum in (PlatformEnum.CUDA, PlatformEnum.ROCM)