Update arm-trusted-firmware submodule to current upstream master

This patch updates the arm-trusted-firmware submodule from:

commit 9fd4a36c408a254d887106e6e3960d496456be2c
(Merge pull request #1211 from Leo-Yan/remove_ca73_cpu_nap_state)

to

commit 693e278e308441d716f7f5116c43aa150955da31
(Merge pull request #1245 from antonio-nino-diaz-arm/an/checkpatch)

This brings in 79 new commits.

Change-Id: Ieceb07760178f8ddbb5cafebabeb78f8def4072d
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/23555
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

1 files changed, 0 insertions, 0 deletions

diff --git a/3rdparty/arm-trusted-firmware b/3rdparty/arm-trusted-firmware
-Subproject 9fd4a36c408a254d887106e6e3960d496456be2
+Subproject 693e278e308441d716f7f5116c43aa150955da3