arm64: dts: renesas: r8a774c0: Add VIN and CSI-2 device nodes

Add device nodes for VIN4, VIN5 and CSI40 to RZ/G2E (a.k.a. R8A774C0)
SoC specific device tree.

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