sample: usb: move Audio 1.0 samples to legacy

Move Audio 1.0 headphones-microphone and headset samples that
demonstrate only legacy device stack functionality to the legacy
directory.

Signed-off-by: Johann Fischer <[email protected]>

Author: jfischer-no

samples/subsys/usb/audio/headphones_microphone/sample.yaml

@@ -1,5 +1,5 @@
 .. zephyr:code-sample:: usb-audio-headphones-microphone
-   :name: USB Audio microphone & headphones
+   :name: Legacy USB Audio microphone & headphones
    :relevant-api: _usb_device_core_api
 
    Implement a USB Audio microphone + headphones device with audio IN/OUT loopback.
@@ -12,6 +12,9 @@ project. This very simple sample that performs loopback over IN/OUT
 ISO endpoints. The device will show up as two audio devices. One
 Input (Microphone) and one Output (Headphones) device.
 
+.. note::
+   This samples demonstrate deprecated :ref:`usb_device_stack`.
+
 Building and Running
 ********************
 
@@ -36,4 +39,4 @@ Steps to test the sample:
 - Verify the recorded audio stream.
 
 This sample can be found under
-:zephyr_file:`samples/subsys/usb/audio/headphones_microphone` in the Zephyr project tree.
+:zephyr_file:`samples/subsys/usb/legacy/audio_headphones_microphone` in the Zephyr project tree.

samples/subsys/usb/audio/headset/sample.yaml

@@ -0,0 +1,10 @@
+sample:
+  name: USB audio Headphones Microphone sample
+tests:
+  sample.usb.legacy.audio.headphones_microphone:
+    depends_on: usb_device
+    tags: usb
+    build_only: true
+    integration_platforms:
+      - nrf52840dk/nrf52840
+      - nrf5340dk/nrf5340/cpuapp

samples/subsys/usb/audio/headphones_microphone/CMakeLists.txt renamed to samples/subsys/usb/legacy/audio_headphones_microphone/CMakeLists.txt

@@ -1,5 +1,5 @@
 .. zephyr:code-sample:: usb-audio-headset
-   :name: USB Audio headset
+   :name: Legacy USB Audio headset
    :relevant-api: _usb_device_core_api
 
    Implement a USB Audio headset device with audio IN/OUT loopback.
@@ -11,6 +11,9 @@ This sample app demonstrates use of a USB Audio driver by the Zephyr
 project. This very simple sample that performs loopback over IN/OUT
 ISO endpoints. The device will show up as single audio device.
 
+.. note::
+   This samples demonstrate deprecated :ref:`usb_device_stack`.
+
 Building and Running
 ********************
 
@@ -35,4 +38,4 @@ Steps to test the sample:
 - Verify the recorded audio stream.
 
 This sample can be found under
-:zephyr_file:`samples/subsys/usb/audio/headset` in the Zephyr project tree.
+:zephyr_file:`samples/subsys/usb/legacy/audio_headset` in the Zephyr project tree.