[CFT] Ralink RT2860, RT2870, RT3060, RT3090 support

[Adrian Chadd]

Hi,

First off, let me say "thankyou" to you, ray@ and all the people who
have chipped away at this little problem. I look very forward to
having rt2xxx 802.11n support, as do many users on the forums. :)

I haven't yet done a pass or two to see what the state of the
locking/concurrency handling is. Don't let that stop you from
committing it though, I'm sure we can find/fix whatever issues creep
up post-commit.

Thanks again!



Adrian