DEVTMPFS is needed for udev
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
[horms+renesas@verge.net.au: resolved trivial conflict]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>