The I2C nodes are missing #address-cells and #size-cells.
This is causing warning at device tree compilation when
some I2C device sub-nodes are defined.
* tag 'sti-dt-for-v4.9-rc-round2' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti:
ARM: dts: STiH407-family: fix i2c nodes