[BUG5388075][fix] Fix error in post-merge-tests (NVIDIA#5949)

Signed-off-by: wili-65535 <[email protected]>
Co-authored-by: wili-65535 <[email protected]>

Author: wili-65535

tensorrt_llm/llmapi/llm_args.py

@@ -1433,7 +1433,7 @@ def validate_speculative_config(self):
                 self.build_config.max_draft_len = self.speculative_config.max_draft_len
                 self.build_config.speculative_decoding_mode = SpeculativeDecodingMode.EAGLE
                 if self.speculative_config.eagle3_one_model:
-                    self.num_extra_kv_tokens = self.max_draft_len - 1
+                    self.speculative_config.num_extra_kv_tokens = self.speculative_config.max_draft_len - 1
                 if self.backend not in ['pytorch', '_autodeploy']:
                     eagle_config = _EagleConfig(
                         self.speculative_config.eagle_choices,