drivers: 15.4: nrf5: Fix warning during compilation

Fixes #4466

Signed-off-by: Kamil Sroka <kamil.sroka@nordicsemi.no>
diff --git a/drivers/ieee802154/ieee802154_nrf5.c b/drivers/ieee802154/ieee802154_nrf5.c
index f76ff08..d7b4d5b 100644
--- a/drivers/ieee802154/ieee802154_nrf5.c
+++ b/drivers/ieee802154/ieee802154_nrf5.c
@@ -446,6 +446,5 @@
 NET_STACK_INFO_ADDR(RX, nrf5_154_radio,
 		    CONFIG_IEEE802154_NRF5_RX_STACK_SIZE,
 		    CONFIG_IEEE802154_NRF5_RX_STACK_SIZE,
-		    ((struct nrf5_802154_data *)
-		    (&__device_nrf5_154_radio))->rx_stack, 0);
+		    nrf5_data.rx_stack, 0);
 #endif