Add device nodes for the I2C Bus Interfaces on the Renesas R-Car V4H
(R8A779G0) SoC.

Extracted from a larger patch in the BSP by Takeshi Kihara.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/272fd18fed2d7addfbdb7945ae2134988a7c3a7e.1662715538.git.geert+renesas@glider.be