ci: update bl31 (no spmd) prebuilts to TF-A v2.8

Rename trusted-firmware-a-trusty to trusted-firmware-a
Generate binaries from upstream TF-A v2.8 release [1].
Qemu platform requires the downstream fix [2].
Do no longer rely on Trusty SPD option for qemu platform.

[1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tag/?h=v2.8
[2] https://android.googlesource.com/trusty/external/trusted-firmware-a/+/351e5ea68331e68e1cfd9322ff9f5f338638a3e2%5E%21/#F0

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: Ibb1b7a425ea86a395c2f41585cd7fe45e3d11260
18 files changed
tree: 5f4dd6e63910c2c93d09a2a2c1854f90589d0367
  1. darwin-x64/
  2. generic/
  3. linux-aarch64/
  4. linux-x64/