ARM: dts: stm32: Add I2C1 support for STM32429 eval board

This patch adds I2C1 instance support for STM32x9I-Eval board.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>