samples: bluetooth: df: rx: Add child img conf for nRF5340 target builds

Add configuration of child image for builds targeted for nRF5340 SOC.
The child image is hci_rpmsg. Besides usual Kconfig overlay there
is also a DTS overlay required for Radio peripheral configuration.

Signed-off-by: Piotr Pryga <[email protected]>

Author: ppryga-nordic

samples/bluetooth/direction_finding_connectionless_rx/child_image/hci_rpmsg.conf

@@ -0,0 +1,25 @@
+#
+# Copyright (c) 2021 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Required to enable BT_BUF_CMD_TX_SIZE for LE Set Extended Advertising Data command
+CONFIG_BT_EXT_ADV=y
+
+# Required to enable BT_PER_ADV_SYNC_MAX
+CONFIG_BT_PER_ADV_SYNC=y
+CONFIG_BT_OBSERVER=y
+
+CONFIG_BT_CTLR=y
+CONFIG_BT_LL_SW_SPLIT=y
+
+CONFIG_BT_CTLR_ADV_EXT=y
+CONFIG_BT_CTLR_SYNC_PERIODIC=y
+
+# Enable Direction Finding Feature including AoA and AoD
+CONFIG_BT_CTLR_DF=y
+CONFIG_BT_CTLR_DF_ANT_SWITCH_TX=n
+
+# Disable Direction Finding TX mode
+CONFIG_BT_CTLR_DF_ADV_CTE_TX=n

samples/bluetooth/direction_finding_connectionless_rx/child_image/hci_rpmsg/nrf5340dk_nrf5340_cpunet.overlay

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+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+&radio {
+	status = "okay";
+	/* This is a number of antennas that are available on antenna matrix
+	 * designed by Nordic. For more information see README.rst.
+	 */
+	dfe-antenna-num = <12>;
+	/* This is a setting that enables antenna 12 (in antenna matrix designed
+	 * by Nordic) for Rx PDU. For more information see README.rst.
+	 */
+	dfe-pdu-antenna = <0x0>;
+
+	/* These are GPIO pin numbers that are provided to
+	 * Radio peripheral. The pins will be acquired by Radio to
+	 * drive antenna switching when AoA is enabled.
+	 * Pin numbers are selected to drive switches on antenna matrix
+	 * desinged by Nordic. For more information see README.rst.
+	 */
+	dfegpio0-gpios = <&gpio0 4 0>;
+	dfegpio1-gpios = <&gpio0 5 0>;
+	dfegpio2-gpios = <&gpio0 6 0>;
+	dfegpio3-gpios = <&gpio0 7 0>;
+};