V4L/DVB (5069): Fix bttv and friends on 64bit machines with lots of memory

We have a DMA32 zone now, lets use it to make sure the card
can reach the memory we have allocated for the video frame
buffers.
Signed-off-by: NGerds Hoffmann <kraxel@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/video-buf.c

@@ -1229,7 +1229,7 @@ videobuf_vm_nopage(struct vm_area_struct *vma, unsigned long vaddr,
 		vaddr,vma->vm_start,vma->vm_end);
 	if (vaddr > vma->vm_end)
 		return NOPAGE_SIGBUS;
-	page = alloc_page(GFP_USER);
+	page = alloc_page(GFP_USER | __GFP_DMA32);
 	if (!page)
 		return NOPAGE_OOM;
 	clear_user_page(page_address(page), vaddr, page);