i810: VM_IO is set by io_remap_pfn_range()

Signed-off-by: Al Viro <[e-mail]>

drivers/gpu/drm/i810/i810_dma.c

···
 	buf = dev_priv->mmap_buffer;
 	buf_priv = buf->dev_private;
 
-	vma->vm_flags |= (VM_IO | VM_DONTCOPY);
+	vma->vm_flags |= VM_DONTCOPY;
 
 	buf_priv->currently_mapped = I810_BUF_MAPPED;