samples: Bluetooth: hci_uart: Add board files for nRF5340ADK

Add board file for nrf5340_audio_dk_nrf5340_cpuapp identical
to the ones for nrf5340dk_nrf5340_cpuapp

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>

Author: Thalley

samples/bluetooth/hci_uart/boards/nrf5340_audio_dk_nrf5340_cpuapp.conf

@@ -0,0 +1,16 @@
+# Host and Controller common dependencies
+CONFIG_BT_EXT_ADV=y
+CONFIG_BT_PER_ADV=y
+CONFIG_BT_PER_ADV_SYNC=y
+CONFIG_BT_PER_ADV_SYNC_MAX=2
+
+# Broadcast and Connected ISO
+CONFIG_BT_ISO_BROADCASTER=y
+CONFIG_BT_ISO_SYNC_RECEIVER=y
+CONFIG_BT_ISO_CENTRAL=y
+CONFIG_BT_ISO_PERIPHERAL=y
+
+# ISO Streams
+CONFIG_BT_ISO_MAX_CHAN=4
+CONFIG_BT_ISO_TX_BUF_COUNT=18
+CONFIG_BT_ISO_RX_BUF_COUNT=1

samples/bluetooth/hci_uart/boards/nrf5340_audio_dk_nrf5340_cpuapp.overlay

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&uart0 {
+	compatible = "nordic,nrf-uarte";
+	current-speed = <1000000>;
+	status = "okay";
+	hw-flow-control;
+};