adding an option for nvidia driver

[Hugo Vanwoerkom <hvw59601@care2.com>]

Hi,

I can't suspend to ram twice. Once works but never the second time.

So I googled that and there are hints that the nvidia driver is a fault 
and the proposed fix is to add 'Nvreg_Mobile=3' as module option.

What is the right way to do that? The solutions varied from modifying 
/etc/modules to changing /etc/modules.conf, which does not exist, and 
running update-modules, which isn't around either.

I am running Sid and use the nvidia driver from the nvidia-installer.

Hugo