Hi Vidya, pre-built u-boot of the latest stable version can be download from here: http://sourceforge.net/projects/adi-u-boot/files/2014R1/2014R1-RC1/
After download file http://sourceforge.net/projects/adi-u-boot/files/2014R1/2014R1-RC1/u-boot-bf609-ezkit-2014R1.tar.bz2/download, extract it, you will find there are different versions of u-boot, for different boot mode respectively, the uart version is the one we need at this stage. Once you get u-boot console, use the running u-boot to tftp load and Flash another correct version of u-boot to your non-volatile storage.
Try and keep us updated.