Fixing data download in Keras README to use DataBank Illinois

hpvm/test/dnn_benchmarks/keras/README.md

@@ -8,14 +8,15 @@ Instructions for Installing the Keras Frontend are [here](https://gitlab.engr.il
 
 ## Download CNN Model Files 
 
-The weight (model) and data files to use with the CNN benchmarks are hosted on Git LFS and need to separately downloaded. This can be done using:
+Prior to running the benchmarks, ensure you download the CNN model data (inputs and weights) if not done in automatic build script.
 
 ```
-git lfs fetch 
-git lfs checkout 
+wget https://databank.illinois.edu/datafiles/o3izd/download -O model_params.tar.gz
+tar -xf  model_params.tar.gz
 ```
 
-**NOTE:** Data donwload is necesary before running benchmarks
+Move extracted `model_params` directory to `/test/dnn_benchmarks/model_params` (Benchmarks expect data at this location)
+
 
 ## Running Benchmaks