[FS#649] WDS not working on ath9k-htc

[LEDE Bugs]

The following task has a new comment added:

FS#649 - WDS not working on ath9k-htc 
User who did this - Miguel (quetzalin)

----------
More tests... and i found a workaround!

I had to add nohwcrypt=1 to /etc/modules.d/ath9k-htc

root at MainRouter:~# cat /etc/modules.d/ath9k-htc
ath9k_htc nohwcrypt=1

But the performance is not optimal, speeds between WDS wifi link are around 10Mbps~~ ...

After doing more tests; 

  - Compiled my own ath9k-htc firmware from here https://github.com/qca/open-ath9k-htc-firmware . 
  - Replaced htc_9271-1.4.0.fw on /lib/firmware/ath9k_htc , then rmmod ath9k_htc and modprobe ath9k_htc , restarted wifi, removed nohwcrypt=1
  - Still disabled WMM Mode on the interface with the USB adapter.

The performance now is better, up to 15Mbps~~ speeds, still HT20 with WMM Mode disabled, even with the compiled firmware WDS doesn't work if i have WMM Mode enabled.
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=649#comment2204