Add video pm quirk for Clevo M720SR

[Danny Kukawka]

On Donnerstag, 27. März 2008, Herton Ronaldo Krzesinski wrote:
> Needed by Clevo M720SR when using video driver provided by sis.

I have commited an adopted version. Could you please send for the logs the 
output of:

   lshal -lu /org/freedesktop/Hal/devices/computer

Thanks,

DAnny