FIX: order of structure initialization

Starting with TSS 4.1.0 there's support for SM4 in the crypto backend.
This is currently not tested in CI (as the version on Ubuntu 22.04 is
older). Though, the order of initialization is important.

src/lib/prov/tpm2/tpm2_crypto_backend/tpm2_crypto_backend_impl.cpp

@@ -877,12 +877,12 @@ void set_crypto_callbacks(ESYS_CONTEXT* ctx, void* callback_state) {
       .get_ecdh_point = &get_ecdh_point,
       .aes_encrypt    = &aes_encrypt,
       .aes_decrypt    = &aes_decrypt,
-      .init           = &init,
-      .userdata       = callback_state,
 #if defined(BOTAN_TSS2_SUPPORTS_SM4_IN_CRYPTO_CALLBACKS)
       .sm4_encrypt    = &sm4_encrypt,
       .sm4_decrypt    = &sm4_decrypt,
 #endif
+      .init           = &init,
+      .userdata       = callback_state,
    };
    // clang-format on