Fixed Realtek test build

Author: Antti Kauppila

targets/TARGET_Realtek/TARGET_AMEBA/rtw_emac.cpp

@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include "mbed_assert.h"
 #include "mbed_events.h"
+#include "mbed_wait_api.h"
 
 #include "rtw_emac.h"
 #include "EMACMemoryManager.h"
@@ -33,7 +34,7 @@
 
 #define RTW_EMAC_MTU_SIZE  (1500U)
 
-RTW_EMAC::RTW_EMAC() 
+RTW_EMAC::RTW_EMAC()
 {
     set_callback_func((emac_callback)(&RTW_EMAC::wlan_emac_recv), this);
 }
@@ -66,7 +67,7 @@ bool RTW_EMAC::get_hwaddr(uint8_t *addr) const
     int i;
 
     if (RTW_SUCCESS == wifi_get_mac_address(mac)) {
-        if (sscanf(mac, "%x:%x:%x:%x:%x:%x", 
+        if (sscanf(mac, "%x:%x:%x:%x:%x:%x",
             &val[0], &val[1], &val[2], &val[3], &val[4], &val[5]) != 6) {
             printf("Get HW address failed\r\n");
         }
@@ -177,7 +178,7 @@ void RTW_EMAC::wlan_emac_recv(void *param, struct netif *netif, uint32_t len)
     buf = enet->memory_manager->alloc_heap(len, 0);
     if (buf == NULL) {
         return;
-    } 
+    }
 
     enet->memory_manager->set_len(buf, len);
     p = buf;
@@ -206,7 +207,7 @@ void mbed_default_mac_address(char *mac) {
 
 void mbed_mac_address(char *mac)
 {
-    char hwaddr[20];    
+    char hwaddr[20];
     int val[6];
     int i;
     if (RTW_SUCCESS == wifi_get_mac_address(hwaddr)) {