dm: Show both allocated and requested seq numbers in 'dm uclass'

Both of these values are useful for understanding what is going on, so show
them both.

The requested number comes from a device tree alias. The allocated one is
set up when the device is activated, and is unique throughout the uclass.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/dm/cmd_dm.c

@@ -77,8 +77,8 @@ static void dm_display_line(struct udevice *dev)
 	printf("- %c %s @ %08lx",
 	       dev->flags & DM_FLAG_ACTIVATED ? '*' : ' ',
 	       dev->name, (ulong)map_to_sysmem(dev));
-	if (dev->req_seq != -1)
+	if (dev->seq != -1 || dev->req_seq != -1)
-		printf(", %d", dev->req_seq);
+		printf(", seq-%d, (req=%d)", dev->seq, dev->req_seq);
 	puts("\n");
 }