CONFIG_SLTTMR -- define to use SLT timer
CONFIG_SYS_I2C_FSL -- define to use FSL common I2C driver
-CONFIG_HARD_I2C -- define for I2C hardware support
CONFIG_SYS_I2C_SOFT -- define for I2C bit-banged
CONFIG_SYS_I2C_SPEED -- define for I2C speed
CONFIG_SYS_I2C_SLAVE -- define for I2C slave address