Change in coreboot[master]: soc/intel/common: add generic gpio lock mechanism

[Nick Vaccaro (Code Review)]

Attention is currently required from: Furquan Shaikh, Tim Wawrzynczak, Patrick Rudolph, Karthik Ramasubramanian.
Nick Vaccaro has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58351 )

Change subject: soc/intel/common: add generic gpio lock mechanism
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Patch Set 4:

(2 comments)

File src/soc/intel/common/block/gpio/gpio.c:

https://review.coreboot.org/c/coreboot/+/58351/comment/4610ef3a_4ac422cf 
PS3, Line 473:
> Nit: Extra line can be removed.

Done

https://review.coreboot.org/c/coreboot/+/58351/comment/bb925990_7912a13a 
PS3, Line 561: int gpio_lock_pad(const gpio_t pad, enum gpio_lock_action action)
> Can the function body be replaced as: […]

It won't be quite as efficient as calling gpio_lock_pad directly, but it does avoid duplicated logic and save some source code space.  Done.