Merge pull request #5479 from donn/pyosys_hotfix

hotfix: workaround for pyosys build failure

Author: mmicko

pyosys/generator.py

@@ -192,7 +192,7 @@ def __post_init__(self):
             ),
             PyosysClass("SigChunk"),
             PyosysClass("SigBit", hash_expr="s"),
-            PyosysClass("SigSpec", hash_expr="s"),
+            PyosysClass("SigSpec", hash_expr="s", denylist={"chunks"}),
             PyosysClass(
                 "Cell",
                 ref_only=True,