board/freescale/common: IDT8T49N222A configuration code

Add code for configuring IDT8T49N222A device for various output refclks
    - The IDT8T49N222A is a low phase noise Frequency Translator / Synthesizer with
      alarm and monitoring functions suitable for networking and
      communications applications. It is able to generate wide range of output
      frequencies.
    - In B4860QDS, it has been used to generate different refclks to SerDes modules
    - Programming of these devices are performed by I2C interface.

Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
Acked-by: York Sun <yorksun@freescale.com>