Move the reading of ETH_MAC_ADDR.

Move the reading of the sysvars for ETH_MAC_ADDR and PON_MAC_ADDR
to be after the reading of those variables from the uboot environment.
We want the sysvar variables to take precedence over the uboot
environment variables.

Change-Id: I78644e1d3748ecf7ea142ffde806bbf9836077b0
1 file changed