[nrf fromlist] drivers: clock_control: Add support for XOTUNE in nRF54L

Adding support for handling XOTUNE event in clock_control.
Right now XOTUNE event reflects situation when HFCLK is stable and tuned.

Signed-off-by: Karol Lasończyk <karol.lasonczyk@nordicsemi.no>
(cherry picked from commit 13b825670b5dbcee08f28325b614659a278365ed)

Author: kl-cruz

drivers/clock_control/clock_control_nrf.c

@@ -613,6 +613,8 @@ static void clock_event_handler(nrfx_clock_evt_type_t event)
 	const struct device *dev = CLOCK_DEVICE;
 
 	switch (event) {
+#if !NRF_CLOCK_HAS_XO_TUNE
+	/* HFCLK started should be used only if tune operation is done implicitly. */
 	case NRFX_CLOCK_EVT_HFCLK_STARTED:
 	{
 		struct nrf_clock_control_sub_data *data =
@@ -627,6 +629,13 @@ static void clock_event_handler(nrfx_clock_evt_type_t event)
 
 		break;
 	}
+#endif
+
+#if NRF_CLOCK_HAS_XO_TUNE
+	case NRFX_CLOCK_EVT_XO_TUNED:
+		clkstarted_handle(dev, CLOCK_CONTROL_NRF_TYPE_HFCLK);
+		break;
+#endif
 #if NRF_CLOCK_HAS_HFCLK192M
 	case NRFX_CLOCK_EVT_HFCLK192M_STARTED:
 		clkstarted_handle(dev, CLOCK_CONTROL_NRF_TYPE_HFCLK192M);
@@ -653,7 +662,6 @@ static void clock_event_handler(nrfx_clock_evt_type_t event)
 		break;
 	case NRFX_CLOCK_EVT_PLL_STARTED:
 #if NRF_CLOCK_HAS_XO_TUNE
-	case NRFX_CLOCK_EVT_XO_TUNED:
 	case NRFX_CLOCK_EVT_XO_TUNE_ERROR:
 	case NRFX_CLOCK_EVT_XO_TUNE_FAILED:
 #endif