This patch fixes the issue LwIP Echo Server application does not work in an
design which has Zynq ENET used with PCS/PMA core on a ZC-706 board.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Acked-by: Anirudha Sarangi <anirudh@xilinx.com>