Extended speech_sample to work on VPUX (#14509)

* Extended speech_sample to work on VPUX

* Fixed review comments

* Returned whitespace back

samples/cpp/speech_sample/README.md

@@ -59,6 +59,7 @@ Several execution modes are supported via the `-d` flag:
 - `CPU` - All calculation are performed on CPU device using CPU Plugin.
 - `GPU` - All calculation are performed on GPU device using GPU Plugin.
 - `MYRIAD` - All calculation are performed on Intel® Neural Compute Stick 2 device using VPU MYRIAD Plugin.
+- `VPUX` - All calculation are performed on VPUX device using VPUX Plugin.
 - `GNA_AUTO` - GNA hardware is used if available and the driver is installed. Otherwise, the GNA device is emulated in fast-but-not-bit-exact mode.
 - `GNA_HW` - GNA hardware is used if available and the driver is installed. Otherwise, an error will occur.
 - `GNA_SW` - Deprecated. The GNA device is emulated in fast-but-not-bit-exact mode.
@@ -102,7 +103,7 @@ Options:
     -i "<path>"                Required. Paths to input file or Layers names with corresponding paths to the input files. Example of usage for single file: <file.ark> or <file.npz>. Example of usage for named layers: <layer1>=<file1.ark>,<layer2>=<file2.ark>.
     -m "<path>"                Required. Path to an .xml file with a trained model (required if -rg is missing).
     -o "<path>"                Optional. Output file name to save scores or Layer names with corresponding files names to save scores. Example of usage for single file: <output.ark> or <output.npz>. Example of usage for named layers: Example of usage for named layers: <layer1:port_num>=<output_file1.ark>,<layer2:port_num>=<output_file2.ark>.
-    -d "<device>"              Optional. Specify a target device to infer on. CPU, GPU, MYRIAD, GNA_AUTO, GNA_HW, GNA_HW_WITH_SW_FBACK, GNA_SW_FP32, GNA_SW_EXACT and HETERO with combination of GNA as the primary device and CPU as a secondary (e.g. HETERO:GNA,CPU) are supported. The sample will look for a suitable plugin for device specified.
+    -d "<device>"              Optional. Specify a target device to infer on. CPU, GPU, MYRIAD, VPUX, GNA_AUTO, GNA_HW, GNA_HW_WITH_SW_FBACK, GNA_SW_FP32, GNA_SW_EXACT and HETERO with combination of GNA as the primary device and CPU as a secondary (e.g. HETERO:GNA,CPU) are supported. The sample will look for a suitable plugin for device specified.
     -pc                        Optional. Enables per-layer performance report.
     -q "<mode>"                Optional. Input quantization mode: static (default), dynamic, or user (use with -sf).
     -qb "<integer>"            Optional. Weight bits for quantization: 8 or 16 (default)
@@ -119,7 +120,7 @@ Options:
     -exec_target "<string>"    Optional. Specify GNA execution target generation. May be one of GNA_TARGET_2_0, GNA_TARGET_3_0. By default, generation corresponds to the GNA HW available in the system or the latest fully supported generation by the software. See the GNA Plugin's GNA_EXEC_TARGET config option description.
     -compile_target "<string>" Optional. Specify GNA compile target generation. May be one of GNA_TARGET_2_0, GNA_TARGET_3_0. By default, generation corresponds to the GNA HW available in the system or the latest fully supported generation by the software. See the GNA Plugin's GNA_COMPILE_TARGET config option description.
 
-Available target devices:  CPU  GNA  GPU
+Available target devices:  CPU  GNA  GPU VPUX
 ```
 
 ### Model Preparation

samples/cpp/speech_sample/speech_sample.hpp

@@ -23,7 +23,7 @@ static const char model_message[] = "Required. Path to an .xml file with a train
 
 /// @brief message for assigning calculation to device
 static const char target_device_message[] =
-    "Optional. Specify a target device to infer on. CPU, GPU, MYRIAD, GNA_AUTO, GNA_HW, "
+    "Optional. Specify a target device to infer on. CPU, GPU, MYRIAD, VPUX, GNA_AUTO, GNA_HW, "
     "GNA_HW_WITH_SW_FBACK, GNA_SW_FP32, "
     "GNA_SW_EXACT and HETERO with combination of GNA as the primary device and CPU"
     " as a secondary (e.g. HETERO:GNA,CPU) are supported. "
@@ -272,7 +272,8 @@ bool parse_and_check_command_line(int argc, char* argv[]) {
                                                  "HETERO:GNA_HW,CPU",
                                                  "HETERO:GNA_SW_EXACT,CPU",
                                                  "HETERO:GNA_SW_FP32,CPU",
-                                                 "MYRIAD"};
+                                                 "MYRIAD",
+                                                 "VPUX"};
 
     if (std::find(supportedDevices.begin(), supportedDevices.end(), FLAGS_d) == supportedDevices.end()) {
         throw std::logic_error("Specified device is not supported.");