What this PR does / why we need it? a2 kernel aclnn interface extern "C" fix Does this PR introduce any user-facing change? No How was this patch tested? vLLM version: v0.12.0 Signed-off-by: tongrunze <t00574058@china.huawei.com> Co-authored-by: tongrunze <t00574058@china.huawei.com>