PMU multi NPU support

Update sample applications to use an external context for the PMU
configuration. The external context stored in the InferenceJob will
be set as TFLu external context and will be returned in the
ethosu_inference_begin() and ethosu_inference_end() callbacks.

Change-Id: Ief1f0943e322c2b50e8b964017af59161f67de6b
diff --git a/applications/freertos/main.cpp b/applications/freertos/main.cpp
index 0f4009e..81631ef 100644
--- a/applications/freertos/main.cpp
+++ b/applications/freertos/main.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2021 Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2022 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -99,17 +99,9 @@
                   const vector<DataPtr> &_output,
                   const vector<DataPtr> &_expectedOutput,
                   const size_t _numBytesToPrint,
-                  const vector<uint8_t> &_pmuEventConfig,
-                  const uint32_t _pmuCycleCounterEnable,
+                  void *_userArg,
                   QueueHandle_t _queue) :
-        InferenceJob(_name,
-                     _networkModel,
-                     _input,
-                     _output,
-                     _expectedOutput,
-                     _numBytesToPrint,
-                     _pmuEventConfig,
-                     _pmuCycleCounterEnable),
+        InferenceJob(_name, _networkModel, _input, _output, _expectedOutput, _numBytesToPrint, _userArg),
         responseQueue(_queue), status(false) {}
 };