samples: bluetooth: df: rx: Move BLE ctrl conf into board spec file

Move BLE controller configuration from top level prj.conf file
into boards/<BOARD>.conf file. That change is required to allow
the sample to build for nRF5340 SOC where BLE cotroller is
run on network core and is not part of the sample application
image.

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

Author: ppryga-nordic

samples/bluetooth/direction_finding_connectionless_rx/boards/nrf52833dk_nrf52833.conf

@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2021 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+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
+
+# Disable Direction Finding TX mode
+CONFIG_BT_CTLR_DF_ANT_SWITCH_TX=n
+CONFIG_BT_CTLR_DF_ADV_CTE_TX=n

samples/bluetooth/direction_finding_connectionless_rx/boards/nrf52833dk_nrf52833.overlay

@@ -9,7 +9,7 @@
 	/* 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 >;
+	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.
 	 */

samples/bluetooth/direction_finding_connectionless_rx/prj.conf

@@ -5,8 +5,6 @@
 #
 
 CONFIG_BT=y
-CONFIG_BT_CTLR=y
-CONFIG_BT_LL_SW_SPLIT=y
 CONFIG_BT_DEVICE_NAME="DF Connectionless Locator App"
 
 CONFIG_BT_EXT_ADV=y
@@ -16,12 +14,3 @@ CONFIG_BT_OBSERVER=y
 # Enable Direction Finding Feature including AoA and AoD
 CONFIG_BT_DF=y
 CONFIG_BT_DF_CONNECTIONLESS_CTE_RX=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