lvds: Enable both LVDS channels on boot

Prior to this patch, we were enabling the LDB controller, but both
LVDS channels remained disabled.  This patch enables both channels.
peripherals: Wait 100ms for I2C to appear

When the ES8328 is powered up, it can take some time for I2C to become
clear.  Wait 100 msec before retrying to query the EEPROM.