fix fp16 benchmark train

test_tipc/benchmark_train.sh

@@ -139,8 +139,8 @@ else
     device_num=${params_list[4]}
     IFS=";"
 
-    if [ ${precision} = "null" ];then
-        precision="fp32"
+    if [ ${precision} = "fp16" ];then
+        precision="amp"
     fi
 
     fp_items_list=($precision)

test_tipc/test_train_inference_python.sh

@@ -265,7 +265,7 @@ else
                 if [ ${run_train} = "null" ]; then
                     continue
                 fi
-                set_autocast=$(func_set_params "${autocast_key}" "${autocast}")
+
                 set_epoch=$(func_set_params "${epoch_key}" "${epoch_num}")
                 set_pretrain=$(func_set_params "${pretrain_model_key}" "${pretrain_model_value}")
                 set_batchsize=$(func_set_params "${train_batch_key}" "${train_batch_value}")