Hello Kanimozhi Thangappan,
The uboot you are referring to is the Community BSP uboot. There are several branches and it’s supported by the community, although this repository has not been updated for a while.
If possible, I would recommend the BSP release repositories, although they cover only NXP boards (which in this case should be no problem)
http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/
I hope this helps!
Regards,