Adopted nsapi header in lwip

EthernetInterface.cpp

@@ -14,9 +14,8 @@
  * limitations under the License.
  */
 
-#include "mbed.h"
 #include "EthernetInterface.h"
-#include "NetworkStack.h"
+#include "mbed.h"
 #include "SingletonPtr.h"
 
 #include "eth_arch.h"

EthernetInterface.h

@@ -17,13 +17,14 @@
 #ifndef ETHERNET_INTERFACE_H
 #define ETHERNET_INTERFACE_H
 
-#include "EthInterface.h"
+#include "nsapi.h"
 #include "rtos.h"
 #include "lwip/netif.h"
 
 // Forward declaration
 class NetworkStack;
 
+
 /** EthernetInterface class
  *  Implementation of the NetworkStack for LWIP
  */
@@ -60,4 +61,5 @@ protected:
     virtual NetworkStack * get_stack(void);
 };
 
+
 #endif