Bluetooth: Controller: Fix LOW_LAT_ULL implementation for ISO support

Fix BT_CTLR_LOW_LAT_ULL implementation for enqueing ISO Rx.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>

Author: cvinayak

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

@@ -800,10 +800,7 @@ static void isr_rx(void *param)
 
 			ull_iso_pdu_rx_alloc();
 			iso_rx_put(node_rx->hdr.link, node_rx);
-
-#if !defined(CONFIG_BT_CTLR_LOW_LAT_ULL)
 			iso_rx_sched();
-#endif /* CONFIG_BT_CTLR_LOW_LAT_ULL */
 
 			cis_lll->rx.bn_curr++;
 			if ((cis_lll->rx.bn_curr > cis_lll->rx.bn) &&

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

@@ -637,10 +637,7 @@ static void isr_rx(void *param)
 
 			ull_iso_pdu_rx_alloc();
 			iso_rx_put(node_rx->hdr.link, node_rx);
-
-#if !defined(CONFIG_BT_CTLR_LOW_LAT_ULL)
 			iso_rx_sched();
-#endif /* CONFIG_BT_CTLR_LOW_LAT_ULL */
 
 			cis_lll->rx.bn_curr++;
 			if ((cis_lll->rx.bn_curr > cis_lll->rx.bn) &&

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

@@ -1523,11 +1523,9 @@ static void isr_rx_done(void *param)
 		lll->payload_tail = payload_index;
 	} while (latency_event--);
 
-#if !defined(CONFIG_BT_CTLR_LOW_LAT_ULL)
 	if (node_rx) {
 		iso_rx_sched();
 	}
-#endif /* CONFIG_BT_CTLR_LOW_LAT_ULL */
 
 	e = ull_event_done_extra_get();
 	LL_ASSERT(e);