mb/google/nissa/var/gothrax: Tune eMMC DLL values

Gothrax cannot boot into OS with a kernel loading failure.
Update eMMC DLL values to improve initialization reliability

How to get these values:
- Sending different speed TX/RX command/data signal to eMMC and check
  the response is successful or not.
- Collecting above results from each eMMC model that project used.
- Analysing logs to provide a fine tuned DLL values.

BUG=b:310701323
TEST=Cold reboot stress test over 2500 cycles

Change-Id: Ie36cc9948e3d5dee46385e584baad141a249be79
Signed-off-by: Simon Yang <simon1.yang@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79220
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>

0 files changed, 0 insertions, 0 deletions