Bluetooth: Controller: nRF54Lx: Use SW_SWITCH_SINGLE_TIMER

Use SW_SWITCH_SINGLE_TIMER for nRF54Lx so that fast ramp
can be used, and hence support assymmetric PHYs in ACL
connections.

nRF54Lx radio domain does not have second timer instance
to efficiently implement software switch unless a second
time is used from a different power domain needed use of
PPIB for the double buffered switch timer compares.

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

Author: cvinayak

subsys/bluetooth/controller/Kconfig.ll_sw_split

@@ -865,8 +865,8 @@ config BT_CTLR_NRF_GRTC_AUTOEN_DEFAULT
 
 config BT_CTLR_RADIO_ENABLE_FAST
 	bool "Use tTXEN/RXEN,FAST ramp-up"
-	depends on SOC_COMPATIBLE_NRF52X || SOC_COMPATIBLE_NRF53X || SOC_SERIES_NRF54LX
-	select BT_CTLR_SW_SWITCH_SINGLE_TIMER if SOC_SERIES_NRF54LX
+	depends on SOC_COMPATIBLE_NRF52X || SOC_COMPATIBLE_NRF53X || SOC_COMPATIBLE_NRF54LX
+	select BT_CTLR_SW_SWITCH_SINGLE_TIMER if SOC_COMPATIBLE_NRF54LX
 	default y
 	help
 	  Enable use of fast radio ramp-up mode.
@@ -881,7 +881,7 @@ config BT_CTLR_TIFS_HW
 config BT_CTLR_SW_SWITCH_SINGLE_TIMER
 	bool "Single TIMER tIFS Trx SW switching"
 	depends on (!BT_CTLR_TIFS_HW) && (SOC_COMPATIBLE_NRF52X || SOC_COMPATIBLE_NRF53X || \
-					  SOC_SERIES_NRF54LX)
+					  SOC_COMPATIBLE_NRF54LX)
 	help
 	  Implement the tIFS Trx SW switch with the same TIMER
 	  instance, as the one used for BLE event timing. Requires