ARM: dts: r8a7743: add VIN dt support

Add VIN[012] support to SoC dt. Also, add aliases.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>