Bluetooth: controller: Clean up direction finding Kconfig

config BT_CTLR_DF_SUPPORT

	bool

	select BT_CTLR_DF_CTE_TX_SUPPORT

	select BT_CTLR_DF_ANT_SWITCH_2US_SUPPORT

	select BT_CTLR_DF_ANT_SWITCH_1US_SUPPORT

config BT_CTLR_DF_CTE_TX_SUPPORT

	bool

	select BT_CTLR_ADV_PERIODIC_SUPPORT

	select BT_CTLR_SYNC_PERIODIC_SUPPORT

	select BT_CTLR_ADV_ISO_SUPPORT

	select BT_CTLR_DF_SUPPORT if HAS_HW_NRF_RADIO_BLE_DF

	select BT_CTLR_CHAN_SEL_2_SUPPORT

	select BT_CTLR_MIN_USED_CHAN_SUPPORT

	select BT_CTLR_DTM_HCI_SUPPORT

	select BT_CTLR_XTAL_ADVANCED_SUPPORT

	select BT_CTLR_SCHED_ADVANCED_SUPPORT

	select BT_CTLR_TIFS_HW_SUPPORT

	# Direction Finding

	select BT_CTLR_DF_SUPPORT if HAS_HW_NRF_RADIO_BLE_DF

	select BT_CTLR_DF_CTE_TX_SUPPORT if HAS_HW_NRF_RADIO_BLE_DF

	select BT_CTLR_DF_ANT_SWITCH_2US_SUPPORT if HAS_HW_NRF_RADIO_BLE_DF

	# optional ant switching slot mode

	select BT_CTLR_DF_ANT_SWITCH_1US_SUPPORT if HAS_HW_NRF_RADIO_BLE_DF

	default y

	help