Bluetooth: Controller: Ticker window extension for broadcaster only

Enable ticker ticks slow window extensions implementation
when broadcaster role is enabled. This feature moves the
primary channel advertising event within the specified
window when overlapping with other roles.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/Kconfig.ll_sw_split

@@ -794,7 +794,7 @@ config BT_TICKER_NEXT_SLOT_GET_MATCH
 config BT_TICKER_EXT
 	bool "Ticker extensions"
 	depends on !BT_TICKER_LOW_LAT && !BT_TICKER_SLOT_AGNOSTIC
-	default y
+	default y if BT_BROADCASTER
 	help
 	  This option enables ticker extensions such as re-scheduling of
 	  ticker nodes with slot_window set to non-zero. Ticker extensions