dts: imx8mq-librem5: Reduce I2C frequency to 384KHz
According to imx8mq errata (ERR007805):
To meet the clock low period requirement in fast speed mode, SCL must be configured to 384KHz or less.
Signed-off-by: Sebastian Krzyszkowiak sebastian.krzyszkowiak@puri.sm
Edited by Eric Kuzmenko