Change in coreboot[master]: mb/google/guybrush: Use register and bit defines for eSPI setup

[Felix Held (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Furquan Shaikh, Marshall Dawson.
Felix Held has uploaded a new patch set (#3) to the change originally created by Raul Rangel. ( https://review.coreboot.org/c/coreboot/+/57051 )

Change subject: mb/google/guybrush: Use register and bit defines for eSPI setup
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mb/google/guybrush: Use register and bit defines for eSPI setup

It's hard to understand what this code is doing because it uses hard
coded values, so use the register and bit defines instead.

BUG=none
TEST=Timeless build for guybrush results in identical binary.

Signed-off-by: Raul E Rangel 
Signed-off-by: Felix Held 
Change-Id: I2d74ed3b9b4984ab1e2a22c50375baf9c9589df0
---
M src/mainboard/google/guybrush/bootblock.c
M src/mainboard/google/guybrush/verstage.c
2 files changed, 23 insertions(+), 18 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/51/57051/3