applications: nrf5340_audio: fix headset_dfu configuration

The FILE_SUFFIX=release was intended to go into `ipc_radio` image.
The applications/nrf5340_audio/sysbuild/ipc_radio/prj_release.conf
should be used, but the file
applications/nrf5340_audio/sysbuild/ipc_radio/prj.conf
was used. This commit fixes that.

The FILE_SUFFIX=fota still is applied to the mcuboot image and the
main application image as it was before.

Signed-off-by: Andrzej Kuros <[email protected]>

Author: ankuns

applications/nrf5340_audio/sample.yaml

@@ -41,7 +41,7 @@ tests:
       - EXTRA_CONF_FILE=unicast_server/overlay-unicast_server.conf
   applications.nrf5340_audio.headset_dfu:
     extra_args:
-      - FILE_SUFFIX=release
-      - CONFIG_AUDIO_DEV=1
       - FILE_SUFFIX=fota
+      - ipc_radio_FILE_SUFFIX=release
+      - CONFIG_AUDIO_DEV=1
       - EXTRA_CONF_FILE=unicast_server/overlay-unicast_server.conf

west.yml

@@ -145,7 +145,7 @@ manifest:
     - name: nrfxlib
       repo-path: sdk-nrfxlib
       path: nrfxlib
-      revision: pull/1674/head
+      revision: b48612da0c37162de938287717da1542aa41e65d
     - name: trusted-firmware-m
       repo-path: sdk-trusted-firmware-m
       path: modules/tee/tf-m/trusted-firmware-m