msm: mdss: Add AD init and config compat ioctl to PP compat layer

Added AD init and cfg compat structures to PP compat ioctl. There are
compat copy functions for each of the AD init and cfg related structures,
in order to simplify the addition of new fields to the structures in the
future.

Signed-off-by: Benet Clark <benetc@codeaurora.org>
Change-Id: Idfc88bf17d95a86a427c82ac03c8e5447db6d329