Revert "disp: fix compilation issue with trusted VM config"

This reverts commit e0b15f4d.

Needed display configs are enabled in trusted vm configuration.
We don't need this change anymore.

Change-Id: Id3b591ce5cfebf5f560a0b60816f7fd76253c347
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>