msm: mdss: cleanup MDP3 driver compilation

Enable MDP3 driver compilation only on chip-sets where MDP3 core is
present. This helps reduce the size of kernel binary where MDP3 is
not present.

Change-Id: I357ff73f91e7ee1654a8666a78efebf68a2a8290
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
arm/dts: hammerhead: Optimize panel init/uninit sequence

Reduce panel on delay from 200ms and panel off from 120ms
to 20ms respectively.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>