modules: hal_nordic: nrf_802154: set clock startup latency

The clock startup latency is now obtained from the clock driver and the
nrf-802154 is now set to a value that matches hardware capabilities.

Signed-off-by: Rafał Kuźnia <rafal.kuznia@nordicsemi.no>

modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c

@@ -18,7 +18,11 @@ static bool hfclk_is_running;
 
 void nrf_802154_clock_init(void)
 {
-	/* Intentionally empty. */
+#ifdef NRF54L_SERIES
+	uint32_t clock_latency_us = z_nrf_clock_bt_ctlr_hf_get_startup_time_us();
+
+	nrf_802154_clock_hfclk_latency_set(clock_latency_us);
+#endif
 }
 
 void nrf_802154_clock_deinit(void)