Revert "display-caf: fix compile for device which don't use RETIRE_FENCE"

The original way is correct. 
This commit really confused me as the maintainers of other devices claim that the flag is being set without them making it true which can't be right.

Yup turns out that the flag was hidden in the BoardConfig somewhere.

This reverts commit 5f6d33fc201d868780f82c277180af43fb0436b4.

Change-Id: Id64662996d13059628d2704a61be0bd72765abee