[FS#655] ramips: mac address parsing

[LEDE Bugs]

The following task has a new comment added:

FS#655 - ramips: mac address parsing
User who did this - psyborg55 (psyborg55)

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https://dev.openwrt.org/ticket/20343 contain eeprom in 5th comment

seems like 2nd mac is unique and need to be changed individually

waiting for your patch to test
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=655#comment2371