change torch.npu.is_available() to is_npu_available in precision.py

torchtune/training/precision.py

@@ -33,7 +33,7 @@ def _set_float32_precision(precision: str = "high") -> None:
     Args:
         precision (str): The setting to determine which datatypes to use for matrix multiplication and convolution operations.
     """
-    if not torch.cuda.is_available() or not torch.npu.is_available():  # Not relevant for non-CUDA devices
+    if not torch.cuda.is_available() or not is_npu_available:  # Not relevant for non-CUDA devices
         return
     # set precision for matrix multiplications
     torch.set_float32_matmul_precision(precision)