Bind DispatchKey.Functionalonalize in pybind11 (#89452)

Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89452
Approved by: https://github.com/albanD, https://github.com/bdhirsh
diff --git a/torch/csrc/utils/python_dispatch.cpp b/torch/csrc/utils/python_dispatch.cpp
index 381e82e..e4ce9cc 100644
--- a/torch/csrc/utils/python_dispatch.cpp
+++ b/torch/csrc/utils/python_dispatch.cpp
@@ -495,6 +495,7 @@
       DEF_ONE(FuncTorchDynamicLayerFrontMode)
       DEF_ONE(FuncTorchDynamicLayerBackMode)
       DEF_ONE(PythonDispatcher)
+      DEF_ONE(Functionalize)
   // clang-format on
 
 #define DEF_SINGLE(n, prefix) .value(#prefix #n, c10::DispatchKey::prefix##n)