[M] Change in coreboot[main]: sb/intel/common: Add GPIO serial blink console support

[Keith Hui (Code Review)]

Attention is currently required from: Intel coreboot Reviewers, Jérémy Compostella, Nicholas Chin, Paul Menzel.

Keith Hui has posted comments on this change by Keith Hui. ( https://review.coreboot.org/c/coreboot/+/86390?usp=email )

Change subject: sb/intel/common: Add GPIO serial blink console support
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Patch Set 3:

(6 comments)

Patchset:

PS3: 
I'm no native English speaker either, so I ran the text through an online grammar checker.

File Documentation/technotes/console.md:

https://review.coreboot.org/c/coreboot/+/86390/comment/9313f0d0_f342e0c3?usp... :
PS2, Line 177: a LED
> an LED

Done

https://review.coreboot.org/c/coreboot/+/86390/comment/5f6d360c_00da7cbb?usp... :
PS2, Line 178: pulls
> pull (without s)?

Done

https://review.coreboot.org/c/coreboot/+/86390/comment/e761be04_6bdaf574?usp... :
PS2, Line 182:
> No space.

Done

https://review.coreboot.org/c/coreboot/+/86390/comment/4e5f9243_8083b433?usp... :
PS2, Line 183: to base your circuit off of
> Sounds strange, but I am no native speaker.

Done

File src/console/Kconfig:

https://review.coreboot.org/c/coreboot/+/86390/comment/e212ac7a_30232b08?usp... :
PS2, Line 405: an
> a

Done