trtllm_ragged_attention_deepseek returns LSE in log2; tokenspeed and
merge_attn_states use natural log. Multiply the trtllm reference by ln 2
before comparison.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Signed-off-by: Yongye Zhu <zyy1102000@gmail.com>