This example shows three Ethernet data transfer
1, EMAC internal loopback
2, PHY loopback
3, loopback between two DSP on TCI6482 EVM, i.e one DSP transfer packet to the other DSP 
	the other DSP sends the packet back
Steps to run the test:
1, connect two DSP on the TCI6482 EVM with ethernet cable (for external loopback between two DSP only)
2, load this project to one DSP for internal or PHY loopback; load this project to both DSPs on TCI6482 EVM 
    for external loopback between two DSP
3, run DSPs for internal or PHY loopback test; run both DSP simultaneously through 
    CCS parellel debug manager for external loopback between two DSP
4, check the stdout of DSP for result
result for internal or PHY loopback or the result on first DSP for external loopback between two DSP
should look like:
-------------------------------------------------------
Calling EMAC_open()
Waiting for link...
Link Status  : 100Mb/s Full Duplex MII on PHY number 1
Packets Held : 32-RX  0-TX
Interrupt Pacing: 0 micro second
Starting packet transfer...
Sent/received 8192/8192 packets (12288000/12288000 Bytes), packet size is 1500 bytes, achieve bandwidth   97515 kbps
Sent/received 8192/8192 packets (10649600/10649600 Bytes), packet size is 1300 bytes, achieve bandwidth   97145 kbps
Sent/received 8192/8192 packets ( 9011200/ 9011200 Bytes), packet size is 1100 bytes, achieve bandwidth   87942 kbps
Sent/received 8192/8192 packets ( 7372800/ 7372800 Bytes), packet size is  900 bytes, achieve bandwidth   95934 kbps
Sent/received 8192/8192 packets ( 5734400/ 5734400 Bytes), packet size is  700 bytes, achieve bandwidth   94836 kbps
Sent/received 8192/8192 packets ( 4096000/ 4096000 Bytes), packet size is  500 bytes, achieve bandwidth   74111 kbps
Sent/received 8192/8192 packets ( 2457600/ 2457600 Bytes), packet size is  300 bytes, achieve bandwidth   88742 kbps
Sent/received 8192/8192 packets (  819200/  819200 Bytes), packet size is  100 bytes, achieve bandwidth   72448 kbps
Calling EMAC_close()
-------------------------------------------------------
result on second DSP for external loopback between two DSP should like following
-------------------------------------------------------
Calling EMAC_open()
Waiting for link...
Link Status  : 100Mb/s Full Duplex RGMII on PHY number 0
Packets Held : 32-RX  0-TX
Interrupt Pacing: 0 micro second
Starting packet receiving and transfer...
Received and send back 16384 packets
Received and send back 40960 packets
Received and send back 65536 packets
