ARM: dts: r8a77470: Add VIN support

Add vin{0|1} nodes to dtsi for VIN support on the RZ/G1C (r8a77470) SoC.

Signed-off-by: Cao Van Dong <cv-dong@jinso.co.jp>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>