Patch llama.py for internal build (pytorch#7239)

Summary:

As title, minor changes so we can use buck to build..

```
buck run mode/dev-nosan //executorch/examples/qualcomm/oss_scripts/llama3_2:llama_qnn -- --compile_only --ptq 16a4w --checkpoint /home/chenlai/local/models/consolidated.00.pth --params /home/chenlai/local/models/params.json --tokenizer_model /home/chenlai/local/models/tokenizer.model --prompt "Once" -m SM8650 --model_size 1B --model_mode kv  2>&1 | tee static_llama.log
```

Differential Revision: D66947240

Author: cccclai

examples/qualcomm/oss_scripts/llama2/llama.py

@@ -492,6 +492,7 @@ def inference(args, pre_gen_pte=""):
             f"model_mode {args.model_mode} is not implemented yet."
         )
 
+    assert args.tokenizer_bin is not None, "Need tokenizer model for interence"
     runner_args = " ".join(
         [
             f"--model_path {pte_filename}.pte",
@@ -562,8 +563,7 @@ def post_process():
             print(f"Results[{idx}]:\n{output}")
 
 
-# flake8: noqa: C901
-if __name__ == "__main__":
+def main():
     parser = setup_common_args_and_variables()
     parser.add_argument(
         "-a",
@@ -597,7 +597,7 @@ def post_process():
     parser.add_argument(
         "--tokenizer_bin",
         help="Pass llama2 tokenizer binary.",
-        required=True,
+        required=False,
         type=str,
     )
 
@@ -680,3 +680,7 @@ def post_process():
                 conn.send(json.dumps({"Error": str(e)}))
         else:
             raise Exception(e)
+
+# flake8: noqa: C901
+if __name__ == "__main__":
+    main()

examples/qualcomm/oss_scripts/llama3_2/llama.py

@@ -218,7 +218,7 @@ def _tag_kv_ios(self, gm: torch.fx.GraphModule, kv_type, sharding_type):
             ] + [n.target]:
                 n.meta[QCOM_QUANTIZED_IO] = sharding_type
 
-    def quantize(self, quant_dtype, custom_annotations=()):
+    def quantize(self, quant_dtype, args, custom_annotations=()):
         self.quant_dtype = quant_dtype
         quantizer = make_quantizer(
             quant_dtype=quant_dtype,
@@ -386,7 +386,8 @@ def compile(args):
     if args.ptq != None:
         start_quantize_ts = time.time()
         single_llama.quantize(
-            quant_dtype,
+            quant_dtype=quant_dtype,
+            args=args,
             custom_annotations=(
                 custom_annotate_llama_last_conv_16a8w,
                 matmul_annotate_func,
@@ -486,8 +487,7 @@ def post_process():
             logging.info(f"Results[{idx}]:\n{output}")
 
 
-# flake8: noqa: C901
-if __name__ == "__main__":
+def main():
     parser = setup_common_args_and_variables()
     parser.add_argument(
         "-a",
@@ -605,3 +605,8 @@ def post_process():
                 conn.send(json.dumps({"Error": str(e)}))
         else:
             raise Exception(e)
+
+
+# flake8: noqa: C901
+if __name__ == "__main__":
+    main()