Change in coreboot[master]: soc/mediatek/mt8186: Support DRAM fast calibration using blob

[Rex-BC Chen (Code Review)]

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

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

https://review.coreboot.org/c/coreboot/+/61133

to look at the new patch set (#26).

Change subject: soc/mediatek/mt8186: Support DRAM fast calibration using blob
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soc/mediatek/mt8186: Support DRAM fast calibration using blob

For most MediaTek SoCs (MT8183, MT8192, MT8195) we rely on an external
program (e.g., the "DRAM blob") to do the full DRAM calibration first,
then store and and apply the generated parameters to the reference
"fast DRAM calibration" in the vendor/mediatek folder for normal system
boot.

Starting with MT8186 the implementation of fast calibration may need
to be changed, and a "DRAM blob" only path is introduced for devices
that have to do both full and fast calibration using the external blob.

TEST=fast calibration pass on kingler/krabby
BUG=b:204226005

Signed-off-by: Xi Chen 
Change-Id: If25a7dd6aa6261ecff79a1b4df8b1f2e53d896dc
---
M src/soc/mediatek/common/Kconfig
M src/soc/mediatek/common/memory.c
M src/soc/mediatek/mt8186/Kconfig
M src/soc/mediatek/mt8186/include/soc/dramc_param.h
M src/soc/mediatek/mt8186/include/soc/dramc_soc.h
5 files changed, 90 insertions(+), 36 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/61133/26