Implement ->driverFunc
Implement ->driverFunc

Copied from fbdev, makes it so we can run without iopl.

Signed-off-by: Adam Jackson <4482611cc290c2ce1399431891dcb9221c95f994@redhat.com>

patjak/xf86-video-gma500,wzyy2/xf86-video-modesetting,wzyy2/xf86-video-modesetting,patjak/xf86-video-gma500