i2c: add support for Amlogic Meson I2C controller

This is a driver for the I2C controller found in Amlogic Meson SoCs.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
ARM: dts: meson: add I2C controller nodes

Add nodes for I2C controllers A,B,AO, which are available in both
Meson6 and Meson8.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
ARM: dts: meson: adapt dts files to minix neo x8 board