gma500: kill virtual mapping support

This isn't actually usable - we simply don't have the vmap space on a 32bit
system to do this stunt. Instead we will rely on the low level drivers
limiting the console resolution as before.

The real fix is for someone to write a page table aware version of the
framebuffer console blit functions. Good university student project
perhaps..

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/gma500/framebuffer.h

@@ -32,7 +32,6 @@ struct psb_framebuffer {
 	struct address_space *addr_space;
 	struct fb_info *fbdev;
 	struct gtt_range *gtt;
-	bool vm_map;		/* True if we must undo a vm_map_ram */
 };
 
 struct psb_fbdev {