drivers:clk: clk-hix5hd2 add the I2C CLK.

    clk-hix5hd2 add the I2C CLK (I2C0~i2C5)

Signed-off-by: yanwei <yanweichh@gmail.com>
drivers:i2c: hix5hd2 add the i2c adapter driver
1) Add i2c-hix5hd2.c file for i2c adapter driver
2) Modify Kconfig and Makefile.
3) Add the descrip doc i2c-hix5hd2.txt on Documentation/devicetree/bindings/

Signed-off-by: yanwei <yanweichh@gmail.com>
arm:dts: hix5hd2 add i2c device nodes

hix5hd2 add i2c device nodes

Signed-off-by: yanwei <yanweichh@gmail.com>
1)add CONFIG_I2C_CHARDEV
2)add CONFIG_I2C_HIX5HD2
3)Del CONFIG_I2C_DESIGNWARE_PLATFORM

Signed-off-by: yanwei <yanweichh@gmail.com>