misc/172955: [ath] 11n does not work in adhoc mode

[Adrian Chadd]

Ok- the problem here is that unfortunately the adhoc code doesn't do
any of the HT field parsing or "upgrading".

Adding the parsing isn't enough, it still doesn't properly negotiate
HT on both ends, so it doesn't upgrade the rate control.

Also - the WME parameters aren't parsed either, leading to your
observation about performance drops between 7x and 8.x.




Adrian