Hello Alejexandre,
You are not going to find SVD file for the i.MX28 since it is an ARM926 Core, which means the only CMSIS-SVD files are for Cortex processors or Microcontrollers like the Kinetis family or the i.MX6 family. In this case if you are using a DS-5 for debugging, I think you only need to have the connection configuration using the proper script to initialize the device and that´s it.