Update on "Convert args to LlmConfig"

Differential Revision: [D75263990](https://our.internmc.facebook.com/intern/diff/D75263990)

[ghstack-poisoned]

Author: jackzhxng

examples/models/llama/TARGETS

@@ -151,6 +151,7 @@ runtime.python_library(
         "//ai_codesign/gen_ai/fast_hadamard_transform:fast_hadamard_transform",
         "//caffe2:torch",
         "//executorch/examples/models/llama/config:llm_config",
+        "//executorch/examples/models/llama/config:llm_config_utils",
         "//executorch/backends/vulkan/_passes:vulkan_passes",
         "//executorch/exir/passes:init_mutable_pass",
         "//executorch/examples/models:model_base",