voxtral_tts: add License section (CC BY-NC 4.0), merge cpu+xnnpack presets

Author: seyeong-han

examples/models/voxtral_tts/CMakePresets.json

@@ -18,13 +18,6 @@
                 "voxtral-tts-base"
             ]
         },
-        {
-            "name": "voxtral-tts-xnnpack",
-            "displayName": "Voxtral TTS runner (XNNPACK)",
-            "inherits": [
-                "voxtral-tts-base"
-            ]
-        },
         {
             "name": "voxtral-tts-cuda",
             "displayName": "Voxtral TTS runner (CUDA)",
@@ -54,15 +47,6 @@
                 "voxtral_tts_runner"
             ]
         },
-        {
-            "name": "voxtral-tts-xnnpack",
-            "displayName": "Build Voxtral TTS runner (XNNPACK)",
-            "configurePreset": "voxtral-tts-xnnpack",
-            "configuration": "Release",
-            "targets": [
-                "voxtral_tts_runner"
-            ]
-        },
         {
             "name": "voxtral-tts-cuda",
             "displayName": "Build Voxtral TTS runner (CUDA)",
@@ -88,20 +72,6 @@
                 }
             ]
         },
-        {
-            "name": "voxtral-tts-xnnpack",
-            "displayName": "Voxtral TTS (XNNPACK)",
-            "steps": [
-                {
-                    "type": "configure",
-                    "name": "voxtral-tts-xnnpack"
-                },
-                {
-                    "type": "build",
-                    "name": "voxtral-tts-xnnpack"
-                }
-            ]
-        },
         {
             "name": "voxtral-tts-cuda",
             "displayName": "Voxtral TTS (CUDA)",

examples/models/voxtral_tts/README.md

@@ -175,6 +175,26 @@ bash examples/models/voxtral_tts/run_cuda_e2e.sh ~/models/Voxtral-4B-TTS-2603
 `es_male`, `fr_female`, `fr_male` (under `voice_embedding/` in the model
 directory).
 
+## License
+
+The ExecuTorch example code in this directory is licensed under the
+BSD-style license found in the repository root.
+
+The [Voxtral-4B-TTS-2603](https://huggingface.co/mistralai/Voxtral-4B-TTS-2603)
+model weights and bundled voice embeddings are licensed by Mistral AI under
+[CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/)
+(Creative Commons Attribution-NonCommercial 4.0 International). This means:
+
+- **Attribution required**: credit Mistral AI and the voice data sources
+  (EARS, CML-TTS, IndicVoices-R, Arabic Natural Audio datasets).
+- **NonCommercial only**: the model weights may not be used for commercial
+  purposes.
+
+The NC restriction originates from the voice reference datasets used to train
+the model. See the
+[model card](https://huggingface.co/mistralai/Voxtral-4B-TTS-2603) for
+full details.
+
 ## Troubleshooting
 
 - **`__cudaLaunch was not declared` during build**: `CPATH` is polluted with