uboot-imx

net:kirkwood_egiga.c: MAC addresses programming using write_hwaddr

Added a new function kwgbe_write_hwaddr for programming egiga
controller's hardware address.
This function will be called for each egiga port being used

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>