ci: update bl31 spmd prebuilt to TF-A v2.8

Rename trusted-firmware-a directory to trusted-firmware-a-spmd.
Rename bl31_spmd.bin to bl31.bin
Update prebuilt bl31.bin binary with TF-A v2.8 release [1]
Update license file from latest of upstream TF-A.

[1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tag/?h=v2.8

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I311c984c168b9d6c074124741623bee3819db3ad
6 files changed
tree: cc36f3477250b7d75c827e2b8c48f4523e7d4a46
  1. darwin-x64/
  2. generic/
  3. linux-aarch64/
  4. linux-x64/