drm/gma500 : Suspend/resume issues

[Guillaume Clément]

> Either way, if I add an empty "save" function, suspend works again (but at
> the moment, resume still doesn't work, I'm still trying to work on that).
> 
> If I just add a "if (connector->funcs->save)", this also fixes the crash.
> 

Actually, the resume problem is exactly the same as the suspend problem.

After adding an empty "resume" function in the connector function, suspend and 
resume both work properly.