kernel-headers: update msm_mdp.h original header

Bug: 7626586
Change-Id: I486a7515ca99f6a841ed90d9a83a81ad5405c06e
Signed-off-by: Iliyan Malchev <malchev@google.com>
Merge android-4.2.2_r1 into dev-mips-jb-mr1