media: videobuf-dma-sg: Fix a weird cast

Just use %p. Fixes this warning:
	drivers/media/v4l2-core/videobuf-dma-sg.c:247 videobuf_dma_init_kernel() warn: argument 2 to %08lx specifier is cast from pointer

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/v4l2-core/videobuf-dma-sg.c

@@ -244,9 +244,8 @@ static int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction,
 		goto out_free_pages;
 	}
 
-	dprintk(1, "vmalloc is at addr 0x%08lx, size=%d\n",
-				(unsigned long)dma->vaddr,
-				nr_pages << PAGE_SHIFT);
+	dprintk(1, "vmalloc is at addr %p, size=%d\n",
+		dma->vaddr, nr_pages << PAGE_SHIFT);
 
 	memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
 	dma->nr_pages = nr_pages;