arm64: dts: renesas: r8a77990: Sort i2c nodes within soc node

Move the i2c nodes so that sub-nodes of the soc node are sorted by bus
address.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>