[S] Change in coreboot[master]: Update arm-trusted-firmware submodule to upstream master

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/72792 )

Change subject: Update arm-trusted-firmware submodule to upstream master
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Patch Set 1:

(2 comments)

Commit Message:

Robot Comment from checkpatch (run ID jenkins-coreboot-checkpatch-169887):
https://review.coreboot.org/c/coreboot/+/72792/comment/f4311159_a2fdfdba 
PS1, Line 9: Updating from commit id 9881bb93a:
Possible unwrapped commit description (prefer a maximum 72 chars per line)

Robot Comment from checkpatch (run ID jenkins-coreboot-checkpatch-169887):
https://review.coreboot.org/c/coreboot/+/72792/comment/65be89f4_0c92f0db 
PS1, Line 12: to commit id 6264643a0:
Possible unwrapped commit description (prefer a maximum 72 chars per line)