[Bugfix][ROCm] Include float8_e4m3fnuz in NCCL Dtype Dispatching (#33713)

Signed-off-by: Micah Williamson <micah.williamson@amd.com>

vllm/distributed/device_communicators/pynccl_wrapper.py

@@ -93,7 +93,7 @@ class ncclDataTypeEnum:
             return cls.ncclFloat64
         if dtype == torch.bfloat16:
             return cls.ncclBfloat16
-        if dtype == torch.float8_e4m3fn:
+        if dtype == current_platform.fp8_dtype():
             return cls.ncclFloat8e4m3
         raise ValueError(
             f"Unsupported dtype {dtype}: should be one of "