[BugFix] Fix logits repetition penalty cuda check (vllm-project#22592)

Signed-off-by: Xiao Yu <xiao.yu@amd.com>

Author: PicoCreator

vllm/_custom_ops.py

@@ -312,7 +312,7 @@ def apply_repetition_penalties(logits: torch.Tensor, prompt_mask: torch.Tensor,
         output_mask: A boolean tensor indicating which tokens appear in the output.
         repetition_penalties: The repetition penalties of shape (num_seqs, ).
     """
-    if current_platform.is_cuda() and logits.is_contiguous():
+    if logits.is_cuda and logits.is_contiguous():
         apply_repetition_penalties_cuda(logits, prompt_mask, output_mask,
                                         repetition_penalties)
     else: