Hi,
Unfortunately the question is not clear to me. In the first line you mentioned that "We got it working now by using FS2 as Chip Select of the Display" and then you are asking if the EPPI initialisation is correct or not. If it is working fine then why you are suspecting EPPI reg values?
I do not see any problem in these settings, as long as you are making sure that FS2 is generated as per your requirement.