[U-Boot] [PATCH] pxe: get ethaddr from the current device instead of env

[Wolfgang Denk]

Dear Rob Herring,

In message <1323129873-8786-1-git-send-email-robherring2 at gmail.com> you wrote:
> 
> The env variable "ethaddr" may not be set, so get the address from the
> eth_device struct instead. This also enables pxe for secondary ethernet
> devices.

This is not correct. The "ethaddr" environment variable shall always
take precedence. Feel free to _additionally_ test other places that
store this information.  If the "ethaddr" environment variable is not
set, then this alternative value can be used as default. In this case
a warning should be printed.  If both settings exist and differ, the
"ethaddr" environment variable shall be used, and a warning be
printed, too.

Best regards,

Wolfgang Denk

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