sidk_s5jt200: make wlan_init() static
wlan_init() is dereferenced by up_wlan_init() only. Let's make it
static.
@@ -45,7 +45,7 @@ struct wlanif {
* ERR_MEM if private data couldn't be allocated
* any other err_t on error
*/
-err_t wlan_init(struct netif *netif)
+static err_t wlan_init(struct netif *netif)
{
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
