platform: msm_shared: defining no-op functions for edp

display.c is shared between platforms. Since LiQUID uses mdp_edp
functions that are defined in mdp5, there is a need to add no-op
functions to mdp4.h and mdp3.
Thus, the compilation for 8960 and 8610 platforms will succeed.

Change-Id: Ib8c37c57d161fe2ba008932c60a54a273332f632
4 files changed