ti-eth: Added j784s4 Ethernet firmware 08.02.02.04

Added first version of Ethernet Firmware for J784S4.  This version
supports the following MAC ports via QSGMII expansion board in
J784S4 EVM:

  MAC Port    PHY Addr	Board	MAC mode
 -----------  --------  ------  --------
 MAC Port 1      16     QSGMII  MAC-only
 MAC Port 3      17     QSGMII  Switch Port
 MAC Port 4      18     QSGMII  MAC-only
 MAC Port 5      19     QSGMII  Switch Port

MD5 Checksums:
64a69c1f6d5e839d35a85603b1d5de50 ti-eth/j784s4/app_remoteswitchcfg_server_strip.xer5f

Signed-off-by: Misael Lopez Cruz <misael.lopez@ti.com>