Export headers in dt-bindings am: 43bfdeb54a am: e82455bef2 am: 72e1771677

Original change: https://android-review.googlesource.com/c/platform/external/arm-trusted-firmware/+/2456228

Change-Id: Ide0e8457a9fc0462f2de4b50ee48c381990157e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>