[TL] Allow T.clear be applied on a "local" Buffer and improve L2 Swizzle

bitblas/base/roller/rasterization.py

@@ -7,12 +7,19 @@
 
 class Rasterization:
 
+    panel_width_ = None
+
     def __init__(self) -> None:
         pass
 
     def get_code(self) -> List[str]:
         raise NotImplementedError()
 
+    @property
+    def panel_width(self):
+        assert self.panel_width_ is not None
+        return self.panel_width_
+
 
 class NoRasterization(Rasterization):