ARM: dts: stm32: set i2c4 bus freq to 400KHz on stm32mp15 DK boards

On DK boards, all I2C4 bus slaves supports I2C Fast Mode hence setting
the bus frequency to 400 KHz.

Signed-off-by: Alain Volmat <alain.volmat@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
1 file changed