Release notes:
https://trustedfirmware-a.readthedocs.io/en/latest/change-log.html#version-2-5
The existing qemu_aarch64_sbsa_defconfig was using an unpinned version
of ATF, so to avoid any regression, it is pinned to the previous
version, 2.4.
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
[yann.morin.1998@free.fr: pin ATF version in qemu_aarch64_sbsa_defconfig]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>