armv8: ls2085a: Add support of random MAC address

Add support of setting RANDOM MAC address if env variable not available.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: York Sun <yorksun@freescale.com>
5 files changed