dts/arm/st: Fix I2C issues in stm32l4 series

Add clocks property in stm32l4r5 devices.
Replace i2c2 node by i2c3 node in l4.dtsi as i2c3 available
in all stm32l4 SoCs while i2c2 is not available in some parts.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
3 files changed