Change the link script to optimum the RAM layout

[sgbihu]

1. Revert the DCCM change
2. Update the link script

[kitsunami]

This is a performance improvement that will go into the next release.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}