working on RX, broke FreeRTOS

bsp_z7/lwip/netif/xadapter.c

@@ -215,11 +215,13 @@ xemacif_input_thread(struct netif *netif)
 {
 	struct xemac_s *emac = (struct xemac_s *)netif->state;
 	while (1) {
+		xil_printf("input started\n");
 		/* sleep until there are packets to process
 		 * This semaphore is set by the packet receive interrupt
 		 * routine.
 		 */
 		sys_sem_wait(&emac->sem_rx_data_available);
+		xil_printf("input received\n");
 
 		/* move all received packets to lwIP */
 		xemacif_input(netif);