style(clang-format): synchronize code style with upstream

This change synchronizes the Clang-Format configuration file with its remote source:

    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/.clang-format


                        EOF

Signed-off-by: Trusted Firmware CI <ci@trustedfirmware.org>
Change-Id: I9a0aca55001acb0bfd8c00c42f9de26189dd1b47