[Nouveau] GPU thermal sensors - hwmon support

[Maxim Levitsky]

Hi,

First of all, thank a lot for the nouveau driver.

I noticed that nouveau lacks a way to read the temperature sensors.
I also see that nvclock reports GPU temperature correctly.

I found out that a patch lifted from nvclock to report the temperature
via kernel hwmon interface at
http://lists.freedesktop.org/archives/nouveau/2009-November/004087.html,

but it was rejected due to it being GPL.

Roderick Colenbrander, could you allow to relicense code contained in
that patch under whatever license drm core is?

Best regards,
Maxim Levitsky