Experiment's over, no clear winner as I get conflicting results so far.
Revert "wl: Re-added some EM-related init code for RT-N66U that was removed by Asus in recent releases.  Unsure yet if it has any real impact on performance."

This reverts commit cda7b4615cac9965a7632406ce950e339f18a45d.
Upgrade RT-N66U drivers to Asus's 376_1071 release