lib: sm: FF-A messages now carry Trusty SM calls am: 35a52ff0b3

Original change: https://android-review.googlesource.com/c/trusty/lk/trusty/+/2203217

Change-Id: I0bffabfd1a7b663b99d26f7929882d7ca6c78f48
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>