[S] Change in coreboot[master]: util/lint/stable-017: Update full config pattern matching

[Maximilian Brune (Code Review)]

Attention is currently required from: Martin L Roth, Paul Menzel, Arthur Heymans.

Maximilian Brune has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74220 )

Change subject: util/lint/stable-017: Update full config pattern matching
......................................................................

Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74220/comment/8f637385_ab0530ba 
PS2, Line 9: CONFIG_ARCH gives false positives for CONFIG_USE_EXP_X86_64_SUPPORT so
           : use a different string: 'CONFIG_MAINBOARD_DIR'.
I don't understand. How does CONFIG_USE_EXP_X86_64_SUPPORT influence the grep for CONFIG_ARCH_? I only see that CONFIG_USE_EXP_X86_64_SUPPORT selects ARCH_ALL_STAGES_X86_64. 
ARCH_ALL_STAGES_X86_64 is not a configurable option, so that is apparently also not the issue.
I tried it out and there also seems to be no problem with the current configs directory.