platform: add MDSS/MDP/DSI register offsets for 8994

Add MDSS/MDP/DSI register offsets for msm8994 target in
mdp and iomap header files. Mdp base, pipe base, CTL
base, dspp base and interface base are different for this
target. This change defines all these base addresses
for display module in shared header files.

Change-Id: I2227887960f279740a237ed195d9102eb3e34253
2 files changed