please test the user/adrian/if_ath_11n branch

[Adrian Chadd]

Hi all,

I've just finished the first cut of the software TX queue
implementation for if_ath. This is needed for 11n TX aggregation which
is a software-driven process for if_ath.

Would people please give this code a test in hostap and station modes?
Please make sure you test it with the lock debugging enabled (eg
WITNESS) so lock ordering problems can be identified and fixed.

Thanks,


Adrian