[FS#39] cns3xxx: ath9k crash caught on boot

[LEDE Bugs]

The following task is now closed:

FS#39 - cns3xxx: ath9k crash caught on boot
User who did this - Mathias Kresin (mkresin)

Reason for closing: Works for me
Additional comments about closing: Closure requested by reported with the follow extra info: Not seen for a few months now. Could be fixed in the meantime. I'll re-open should it happen again. Closing it avoids having this one open forever

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=39