Bluetooth: Controller: Fix ISR profiling for single timer use

Fix ISR profiling when using single timer for tIFS radio
switching wherein in the timer is cleared on every radio
end. Hence, the captured timer value is the latency and
does not required the radio end timestamp to be subtracted.

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

Author: cvinayak

subsys/bluetooth/controller/ll_sw/nordic/lll/lll_prof.c

@@ -294,11 +294,15 @@ static uint16_t latency_get(void)
 	/* calculate the elapsed time in us since on-air radio packet end
 	 * to ISR entry
 	 */
+#if !defined(CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER)
 #if defined(HAL_RADIO_GPIO_HAVE_PA_PIN)
 	latency = timestamp_latency - timestamp_radio_end;
 #else /* !HAL_RADIO_GPIO_HAVE_PA_PIN */
 	latency = timestamp_latency - radio_tmr_end_get();
 #endif /* !HAL_RADIO_GPIO_HAVE_PA_PIN */
+#else /* CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER */
+	latency = timestamp_latency;
+#endif /* CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER */
 
 	return latency;
 }