Fix batch prefill compile fail in aiter#3279
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* Fix batch prefill aiter compile fail * Fix compile error
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Proposed changes
fix compile error of batch prefill in aiter
Checklist
fmha_batch_prefill does not have exmple in CK, which means CK will not compile this kernel.
So this change does not affect CK CI.
We could only test it in aiter.
ROCm/aiter#1459
This PR cause this issue
In aiter, using test_batch_prefill.py to test
python op_tests/test_batch_prefill.py