hw/ppc/e500: Add missing device tree properties to i2c controller node

hw/ppc/e500: Add missing device tree properties to i2c controller node

When compiling a decompiled device tree blob created with dumpdtb, dtc complains
with:

  /soc@e0000000/i2c@3000: incorrect #address-cells for I2C bus
  /soc@e0000000/i2c@3000: incorrect #size-cells for I2C bus

Fix this by adding the missing device tree properties.

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-ID: <20241103133412.73536-6-shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>