Fix CPLD attributes reference

Summary: An attribute was misnamed resulting in build errors.

Test Plan:
Build new layer including CPLD configs, build succeeds:

```
❯ python new-fblite.py -n newtest -d ~/new_layer_conf.json
Work directory is set to /data/users/smithscott/openbmc
Copy tools/fboss-lite/fblite-ref-layer to meta-facebook/meta-newtest..
processing files under meta-facebook/meta-newtest/conf..
processing files under meta-facebook/meta-newtest/conf/machine..
processing files under meta-facebook/meta-newtest/conf/templates/default..
processing files under meta-facebook/meta-newtest/recipes-bsp/u-boot..
processing files under meta-facebook/meta-newtest/recipes-bsp/u-boot/files..
processing files under meta-facebook/meta-newtest/recipes-core/images..
processing files under meta-facebook/meta-newtest/recipes-core/mTerm..
processing files under meta-facebook/meta-newtest/recipes-core/systemd..
processing files under meta-facebook/meta-newtest/recipes-core/systemd-networkd..
processing files under meta-facebook/meta-newtest/recipes-core/systemd-networkd/files..
processing files under meta-facebook/meta-newtest/recipes-kernel/kmods..
processing files under meta-facebook/meta-newtest/recipes-kernel/kmods/files..
processing files under meta-facebook/meta-newtest/recipes-kernel/linux..
processing files under meta-facebook/meta-newtest/recipes-kernel/linux/board_config..
processing files under meta-facebook/meta-newtest/recipes-kernel/linux/patches..
processing files under meta-facebook/meta-newtest/recipes-utils/openbmc-utils..
processing files under meta-facebook/meta-newtest/recipes-utils/openbmc-utils/files..
processing files under meta-facebook/meta-newtest/recipes-utils/wedge-eeprom..
```

Reviewed By: tao-ren

Differential Revision: D50135233

fbshipit-source-id: 2f2dd8b42d91b4b7a05a03bdd54e29402e73ece4

tools/fboss-lite/new_fblite_utils/gen_cplds.py

@@ -93,7 +93,7 @@ def gen_cplds(data_file: str, kmod_dir: str):
 
 
 def gen_cpld(data: CpldSpec, output_dir: str):
-    content = render_template(CPLD_TEMPLATE, name=data.name, attributes=data.attributes)
+    content = render_template(CPLD_TEMPLATE, name=data.name, attributes=data.attrs)
     output = os.path.join(output_dir, data.name + ".c")
     with open(output, "w") as f:
         f.write(content)