soc/amd/common/block/spi: Support fast speed override

Add support to override SPI ROM fast speed based on board version. This
will allow boards to start at lower speeds during bringup and then
switch to higher speeds after assessing the signal integrity. Also
implement a default no-op override.

BUG=None
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: Ia8ff3b3bdb53fee142527ae63aa7785945909304
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58116
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