[AMD] Update gfx1250 MXFP FA example kernel (#9414)

Include recent some optimizations for MXFP FA kernel.

Author: borontion

third_party/amd/python/examples/gluon/gfx1250_utils.py

@@ -8,9 +8,8 @@ def __getattr__(self, name):
         if name in self.__dict__:
             return object.__getattribute__(self, name)
         for member in self.__dict__.values():
-            if getattr(member, "__triton_aggregate__", False) and not hasattr(member, name):
-                continue
-            return getattr(member, name)
+            if getattr(member, "__triton_aggregate__", False) and hasattr(member, name):
+                return getattr(member, name)
         raise AttributeError(f"{type(self).__name__} object has no attribute '{name}'")
 
     cls.__getattr__ = __getattr__