### What this PR does / why we need it?
Mainline vLLM fixes its disaggregated prefill in
https://github.com/vllm-project/vllm/pull/22598 . But it is still not
working in vllm-ascend.
To be concrete, decoder instances crash before vllm's fix and hang after
vllm's fix in ascend devices.
This patch allows disaggregated prefill to work.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Qwen3-0.6B 1P1D tp=1 dp=1
- vLLM version: v0.10.0
- vLLM main:
0fe85087a9
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Signed-off-by: CaveNightingale <cavenightingale@foxmail.com>