Comment 190 for bug 1160188

Tested also with mainline 3.9.5, applied first https://patchwork.kernel.org/patch/2696121/ then http://msujith.org/patches/wl/Jun-13-2013/0001-ath9k-Add-custom-parameters-for-CUS198.patch. Applied with some fuzz, no manual intervention required, results look the same as with 3.8.0.