db845c: Enable boot image header v3 support am: dd5bd1b45d am: f1d4824cec

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/1533191

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5710c997b59162740067ab477aa6089b8370b8bb