The version of the ARM Trusted Firmware from Marvell was a Git branch,
not a Git commit, leading to unreproducible results. So let's use a
Git commit instead, which is the latest available from the branch that
was previously used.
More specifically, this branch has recently seen a fix that is needed
for ATF to build properly with recent gcc versions:
c96ec59f8b
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit ac260a2ace)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>