drm/msm/mdp5: Add MDP5 configuration for MSM8x36.

This change adds MDP5 configuration for MSM8x36-based SoCs,
like MSM8936, 8939 and their APQ variants.
The configuration is based on MSM8916's, but adds some notable
features, like ad and pp blocks, along with some register
changes.

changes since v1:
- add an ad block
- add a second mixer @ 0x47000
- adjust .max_width
- write a more descriptive commit message

Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>