Hi @saransh09,
No, there has not been any further activity here. The key reason is that this generalizes very, very badly. Most ARM-based devices have a more or less customized boot flow and loader, which requires patching and compilation per device type.
Together with the fact that such an operation is always highly error prone, there is little value in creating a one-size-fits-all solution.
I know of a number of approaches that have been successfully carried out, often leveraging some hardware specific tricks or capabilities. If you can share details on the board and setup then we can try to help here. If this is considered confidential, then please get in touch with contact@mender.io.
Greetz,
Josef