sample: Bluetooth: Fix broadcast audio source sink conf file

Fix broadcast audio source and sink samples' conf file to
use Broadcast ISO feature in Zephyr Bluetooth Controller.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>

samples/bluetooth/broadcast_audio_source/sample.yaml

@@ -4,7 +4,21 @@ sample:
 tests:
   sample.bluetooth.broadcast_audio_source:
     harness: bluetooth
-    platform_allow: qemu_cortex_m3 qemu_x86 nrf52_bsim
+    platform_allow: >
+      qemu_cortex_m3
+      qemu_x86
+      nrf5340dk_nrf5340_cpuapp
     integration_platforms:
       - qemu_x86
+      - nrf5340dk_nrf5340_cpuapp
+    tags: bluetooth
+  sample.bluetooth.broadcast_audio_sink.bt_ll_sw_split:
+    harness: bluetooth
+    platform_allow: >
+      nrf52833dk_nrf52820
+      nrf52833dk_nrf52833
+    integration_platforms:
+      - nrf52_bsim
+      - nrf52833dk_nrf52833
+    extra_args: OVERLAY_CONFIG=overlay-bt_ll_sw_split.conf
     tags: bluetooth