Update arm-trusted-firmware submodule to upstream master

Updating from commit id 7ad39818b:
2020-10-12 09:16:21 +0000 - (Merge "mediatek: mt8192: add GIC600 support" into integration)

to commit id 96404aa27:
2021-05-13 18:27:27 +0200 - (Merge "build(hooks): update Commitizen to ^4.2.4" into integration)

This brings in 861 new commits.

Change-Id: I912545022e4320b86ab8a382144c02e315d0c835
Signed-off-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54289
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

1 files changed, 0 insertions, 0 deletions

diff --git a/3rdparty/arm-trusted-firmware b/3rdparty/arm-trusted-firmware
-Subproject 7ad39818b184850d263008e7d36ba16adf72a66
+Subproject 96404aa27efbf1c9051d515075a60c3cf4fa47b