mb/google/guybrush: Override SPI Fast speeds

Add support to override SPI fast speeds based on board version from both
bootblock and verstage. Overrides apply for Guybrush only and SPI speed
is overridden from 66 MHz to 100 MHz starting board version 4. This will
help to improve the boot time on board version by ~60 ms and still allow
the old boards to boot with 66 MHz.

BUG=b:199779306
TEST=Build and boot to OS in Guybrush. Perform S5->S0, G3->S0, warm
reset and suspend/resume cycles for 50 iterations each.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I5bf03ab8772f27aca346589e9c5662caf014d0d2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58117
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

0 files changed, 0 insertions, 0 deletions