[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.

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 1:

(1 comment)

File src/southbridge/intel/common/gpio.c:

https://review.coreboot.org/c/coreboot/+/86390/comment/f91b111f_60598c8f?usp... :
PS1, Line 195: CONSOLE_INTEL_GPSB)
> Couldn't in its own C file instead ?

Because static get_gpio_base(). To put this code in its own file I'll need to make it not static and set up headers accordingly. If that's ok I'll do it.

Also, once factored out should it live in console/ or sb/intel/common?