fix bug for kunlunxin run sd demo for uing fp16 (PaddlePaddle#1680)

* modify sd infer.py for using paddle_kunlunxin_fp16

* Update infer.py

* [fix bug] fix bug sd in demo infer.py for kunlunxin using fp16

Author: wgy0804

examples/multimodal/stable_diffusion/infer.py

@@ -324,7 +324,7 @@ def get_scheduler(args):
         start = time.time()
         unet_runtime = create_kunlunxin_runtime(
             args.model_dir, args.unet_model_prefix, 
-            args.ues_fp16,
+            use_fp16=args.ues_fp16,
             device_id=args.device_id)
         print(f"Spend {time.time() - start : .2f} s to load unet model.")
     pipe = StableDiffusionFastDeployPipeline(