The MAC addresses for the PRU Ethernet ports will be available in the board EEPROM as an address range. Populate those MAC addresses (if valid) into the u-boot environment so that they can be passed on to the device tree during fdt_fixup_ethernet(). Signed-off-by: Roger Quadros <rogerq@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>