Change in coreboot[master]: vc/mediatek/mt8195: Improve DRAM driver

[Rex-BC Chen (Code Review)]

Attention is currently required from: Hung-Te Lin, Rex-BC Chen, Ryan Chuang.
Hello Hung-Te Lin, build bot (Jenkins), Ryan Chuang, Yu-Ping Wu,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/56099

to look at the new patch set (#2).

Change subject: vc/mediatek/mt8195: Improve DRAM driver
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vc/mediatek/mt8195: Improve DRAM driver

1. Improve settings of duty calibration.
2. Enable VREF calibration at DDR3200 for enter/exit S0 stability.
3. Enable DRAM Vcore DVFS settings.

Signed-off-by: Ryan Chuang 
Change-Id: I8ae81bf26e3665e595721577794836ef39b55ef7
---
M src/vendorcode/mediatek/mt8195/dramc/dramc_pi_calibration_api.c
M src/vendorcode/mediatek/mt8195/dramc/dramc_pi_main.c
M src/vendorcode/mediatek/mt8195/dramc/dramc_top.c
M src/vendorcode/mediatek/mt8195/include/dramc_pi_api.h
4 files changed, 13 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/99/56099/2