[FS#473] ath9k unstable - kernel panic every ~5 minutes

[LEDE Bugs]

A Project Manager has denied the request pending for the following task:

FS#473 - ath9k unstable - kernel panic every ~5 minutes
User who did this - Mathias Kresin (mkresin)

Reason for denial:
Finally fixed with the latest commits.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=473