ARM: dts: k2g: Add I2C nodes to 66AK2Gx

Add I2C nodes to the 66AK2Gx dtsi.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>