fix: correct scale parameter remapping logic in Llama4ForConditionalGeneration (sgl-project#11282)

Author: JustinTong0323

python/sglang/srt/models/mllama4.py

@@ -710,7 +710,7 @@ def _handle_scale_remapping(self, name: str, params_dict: dict) -> bool:
         """Handle scale parameter remapping. Returns True if handled."""
         if "scale" in name and "expert" not in name:
             remapped_name = maybe_remap_kv_scale_name(name, params_dict)
-            return remapped_name is not None and remapped_name != name
+            return remapped_name != name
         return False
 
     def _handle_stacked_params(