[nrf fromlist] drivers: clock_control: nrf: ifdef PLL started event

This event is defined only for devices that have PLL
in the CLOCK peripheral.

Upstream PR #: 86238

Signed-off-by: Nikodem Kastelik <[email protected]>

Author: nika-nordic

drivers/clock_control/clock_control_nrf.c

@@ -637,7 +637,9 @@ static void clock_event_handler(nrfx_clock_evt_type_t event)
 			__ASSERT_NO_MSG(false);
 		}
 		break;
+#if NRF_CLOCK_HAS_PLL
 	case NRFX_CLOCK_EVT_PLL_STARTED:
+#endif
 #if NRF_CLOCK_HAS_XO_TUNE
 	case NRFX_CLOCK_EVT_XO_TUNED:
 	case NRFX_CLOCK_EVT_XO_TUNE_ERROR: