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

[Paul Menzel (Code Review)]

Attention is currently required from: Intel coreboot Reviewers, Jérémy Compostella, Keith Hui, Nicholas Chin.

Paul Menzel 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 2:

(6 comments)

Patchset:

PS2: 
Nice.

File Documentation/technotes/console.md:

https://review.coreboot.org/c/coreboot/+/86390/comment/6460dc4b_e79c432f?usp... :
PS2, Line 177: a LED
an LED

https://review.coreboot.org/c/coreboot/+/86390/comment/fd9c6ecc_3c35881a?usp... :
PS2, Line 178: pulls
pull (without s)?

https://review.coreboot.org/c/coreboot/+/86390/comment/a13eede4_f650dc60?usp... :
PS2, Line 182:  
No space.

https://review.coreboot.org/c/coreboot/+/86390/comment/17751906_08e7dfa9?usp... :
PS2, Line 183: to base your circuit off of
Sounds strange, but I am no native speaker.

File src/console/Kconfig:

https://review.coreboot.org/c/coreboot/+/86390/comment/2ddef560_6cc498cc?usp... :
PS2, Line 405: an
a