iomux-mx53: add missing 'IOMUX_CONFIG_SION' for some I2C pad definitions

The I2C controller requires the SION bit to be set on SDA and SCL pins.
This is missing on some pad definitions for the I2C function.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>