### What this PR does / why we need it?
1、update prepare_finalize.py:fix A2 accuracy problem when pcp and dcp
- vLLM version: v0.11.0
- vLLM main:
83f478bb19
Signed-off-by: LookAround <lixushi@huawei.com>
### What this PR does / why we need it?
1、update prepare_finalize.py:fix A2 accuracy problem when pcp and dcp
- vLLM version: v0.11.0
- vLLM main:
83f478bb19
Signed-off-by: LookAround <lixushi@huawei.com>