A13 uboot:undefined reference to 'i2c_read'

[Any012]

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- A13-Lichee_config
time make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- 2>&1 | tee build.log

error:
arch/arm/mach-sunxi/built-in.o: In function pmic_bus_read:
/home/any/ilichee/u-boot-sunxi/arch/arm/mach-sunxi/pmic_bus.c:64:undefined reference to i2c_read'
arch/arm/mach-sunxi/built-in.o: In function pmic_bus_read:
/home/any/ilichee/u-boot-sunxi/arch/arm/mach-sunxi/pmic_bus.c:64:undefined reference to 'i2c_write'
make[1]: *** [spl/u-boot-spl] Error 1
make: *** [spl/u-boot-spl] Error 2

the 'arm-linux-gnueabihf- A13-Lichee_config' file was downlaod from
https://github.com/Zepan/ilichee/tree/master/ConfigFiles

the operationsystem is Ubuntu 14.04. the version of GCC is 4.7.

[ghost]

Download again the config file, it has been updated.
CONFIG_SPL_I2C_SUPPORT=y has to be added.