[FS#1072] AR71xx / TP-RE450: Can't build image with kernel 4.9.x

[LEDE Bugs]

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FS#1072 - AR71xx / TP-RE450: Can't build image with kernel 4.9.x
User who did this: Piotr Dymacz (pepe2k)
Percent Complete: 0% -> 90%

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1072