[ROCm][CI] fix fp8 range in vit_fp8_quant (#46410)

Signed-off-by: Divakar Verma <divakar.verma@amd.com>
Signed-off-by: Divakar Verma <137818590+divakar-amd@users.noreply.github.com>
Co-authored-by: Andreas Karatzas <akaratza@amd.com>
Co-authored-by: Wentao Ye <44945378+yewentao256@users.noreply.github.com>

tests/kernels/core/test_vit_fp8_quant.py

@@ -5,6 +5,9 @@
 import pytest
 import torch
 
+from vllm.model_executor.layers.quantization.utils.quant_utils import (
+    get_fp8_min_max,
+)
 from vllm.platforms import current_platform
 from vllm.triton_utils import HAS_TRITON
 
@@ -24,8 +27,7 @@ def _naive_fp8_quantize(
 ) -> torch.Tensor:
     """Reference FP8 quantization in PyTorch."""
     fp8_dtype = current_platform.fp8_dtype()
-    fp8_max = torch.finfo(fp8_dtype).max
-    fp8_min = -fp8_max
+    fp8_min, fp8_max = get_fp8_min_max()
 
     x = tensor.float()
     if not skip_scale: