msm_mdp: Update header for 4 layer support

Bug: 7626586
Change-Id: I37730470dc09b7a9d6336b1603f87efd98f45e97
Signed-off-by: Iliyan Malchev <malchev@google.com>
revert

Change-Id: I0fa01b5b183348659e7475edc95e1b7a6a5d95ac
msm_mdp: Update header for 4 layer support

Bug: 7626586
Change-Id: I37730470dc09b7a9d6336b1603f87efd98f45e97
Signed-off-by: Iliyan Malchev <malchev@google.com>