drivers: wifi: siwx91x: Also update interface state on AP

It seems there is no functional impact, but it makes sense to also update
the state of the interface when AP is started/stopped.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>

Author: jerome-pouiller

drivers/wifi/siwx91x/siwx91x_wifi.c

@@ -641,6 +641,9 @@ static int siwx91x_ap_disable(const struct device *dev)
 		return -EIO;
 	}
 
+	if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X_NET_STACK_NATIVE)) {
+		net_if_dormant_on(sidev->iface);
+	}
 	wifi_mgmt_raise_ap_disable_result_event(sidev->iface, WIFI_STATUS_AP_SUCCESS);
 	sidev->state = WIFI_STATE_INTERFACE_DISABLED;
 	return ret;
@@ -848,6 +851,9 @@ static int siwx91x_ap_enable(const struct device *dev, struct wifi_connect_req_p
 		wifi_mgmt_raise_ap_enable_result_event(sidev->iface, WIFI_STATUS_AP_FAIL);
 		return -EIO;
 	}
+	if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X_NET_STACK_NATIVE)) {
+		net_if_dormant_off(sidev->iface);
+	}
 
 	return 0;
 }