[FS#1094] no connection on any ethernet ports (incl internet) on WRT1200AC

[LEDE Bugs]

The following task has a new comment added:

FS#1094 - no connection on any ethernet ports (incl internet) on WRT1200AC
User who did this - George (giunz)

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I can confirm that I had the same issue with this device and version. 
As a temporary solution until a fix is out and since I had access to the terminal from WiFi, I used  fw_printenv boot_part and fw_setenv boot_part to turn back to openwrt
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1094#comment3756