Intel 3160/7260/7265 driver

[Rui Paulo]

Hi,

I've ported the OpenBSD iwm driver and it's sort of working now:

	https://github.com/rpaulo/iwm

Some issues:
- scanning is sort of broken now, so you must set the channel with ifconfig
- ultra debugging mode is activated, so expect a lot of logs.

This still needs quite a bit of work before it can be part of FreeBSD, but 
this email is being sent over iwm.  :-)

I only have a 7265, so I'd like people with 3160 or 7260 to try it out.

Regards,
-- 
Rui Paulo