ARM: dts: r7s72100: Add Capture Engine Unit (CEU)

Add Capture Engine Unit (CEU) node to device tree.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
[simon: rebased]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>