Bluetooth: controller: set refactored LLCP as default for DF

This PR sets the refactored LLCP as the default instead of legacy
so that more people will use this, giving us more feedback

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
diff --git a/subsys/bluetooth/controller/Kconfig.ll_sw_split b/subsys/bluetooth/controller/Kconfig.ll_sw_split
index b54d346..c84f98c 100644
--- a/subsys/bluetooth/controller/Kconfig.ll_sw_split
+++ b/subsys/bluetooth/controller/Kconfig.ll_sw_split
@@ -73,12 +73,14 @@
 
 choice BT_LL_SW_LLCP_IMPL
 	prompt "Bluetooth Low Energy Software Link Layer Control Procedure Implementation"
+	default BT_LL_SW_LLCP if BT_CTLR_DF_CONN_CTE_RX || BT_CTLR_DF_CONN_CTE_TX
 	default BT_LL_SW_LLCP_LEGACY
 	help
 	  Select the Bluetooth Low Energy Software Link Layer Control Procedure implementation.
 
 config BT_LL_SW_LLCP_LEGACY
 	bool "Legacy implementation"
+	depends on !BT_CTLR_DF_CONN_CTE_RX && !BT_CTLR_DF_CONN_CTE_TX
 	help
 	  Use the Bluetooth Low Energy Software Link Layer Legacy Control Procedure implementation.