[Attention] Refine TRTLLM attention support for MiniMax H3 (#5779)

Signed-off-by: Bo Li <22713281+bobboli@users.noreply.github.com>
Signed-off-by: lishunyang12 <lishunyang03@gmail.com>
Signed-off-by: lishunyang12 <lishunyang12@163.com>
Co-authored-by: lishunyang12 <lishunyang03@gmail.com>
Co-authored-by: lishunyang12 <lishunyang12@163.com>

vllm_omni/diffusion/data.py

@@ -1434,6 +1434,10 @@ class SkipSoftmaxSpec:
         if self.target_sparsity is not None and self.threshold is not None:
             raise ValueError("skip_softmax: set either target_sparsity or threshold, not both.")
 
+    @property
+    def enabled(self) -> bool:
+        return self.threshold is not None or self.target_sparsity is not None
+
 
 @dataclass
 class AttnQuantSpec: