Log Message:
Add Trusted Firmware-A (TF-A, the new name for Arm'sATF) v2.6 with
support for rk3328 (not yet tested), rk3399 (tested), and fiptool.

these will obsolete the existing arm-trusted-firmware* (v2.3) packages
once all consumers are updated and tested, and currently the sun50i_a64
and sun50i-h6 targets are not yet available.