Registers pRxCb callback.
Registers pRxCb callback.
Callback will be invoked after the next received frame. When
EMAC_Poll() returns EMAC_RX_NO_DATA the application task call
EMAC_Set_RxCb() to register pRxCb() callback and enters suspend
state. The callback is in charge to resume the task once a new frame has been received. The next time
EMAC_Poll() is called, it will be successfull.