[L] Change in coreboot[main]: soc/mediatek/mt8196: Add DDP driver

[Nancy Lin (Code Review)]

Attention is currently required from: Hung-Te Lin, Jarried Lin, Nancy Lin.

Nancy Lin has uploaded a new patch set (#3) to the change originally created by Jarried Lin. ( https://review.coreboot.org/c/coreboot/+/85950?usp=email )

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: soc/mediatek/mt8196: Add DDP driver
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soc/mediatek/mt8196: Add DDP driver

Add DDP (display controller) driver that supports main path to
eDP panel.

TEST=build pass and firmware display ok
BUG=b:343351631
Signed-off-by: Nancy Lin 
Change-Id: I006911e83d940c1eec7135a6a0c36fbfa2aad466
---
M src/soc/mediatek/common/display.c
M src/soc/mediatek/mt8196/Makefile.mk
A src/soc/mediatek/mt8196/ddp.c
M src/soc/mediatek/mt8196/include/soc/addressmap.h
A src/soc/mediatek/mt8196/include/soc/ddp.h
A src/soc/mediatek/mt8196/include/soc/dsi.h
6 files changed, 808 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/50/85950/3