arm64: dts: renesas: r8a774a1: Put I2C aliases to board files

I2C aliases are not a property of a SoC. They belong to board files
where they are named accordingly in the schematics.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20220825071022.7864-7-wsa+renesas@sang-engineering.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>