Change in coreboot[master]: soc/mediatek/mt8186: Add DDP driver

[Rex-BC Chen (Code Review)]

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

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

https://review.coreboot.org/c/coreboot/+/60396

to look at the new patch set (#4).

Change subject: soc/mediatek/mt8186: Add DDP driver
......................................................................

soc/mediatek/mt8186: Add DDP driver

Add DDP (display controller) driver that supports main path to
eDP panel. The output goes to display interface DSI.

BUG=b:209930699
TEST=saw firmware display

Signed-off-by: Rex-BC Chen 
Change-Id: Ic4fb40832b5dc7a815b37266259b2e3281ee79f1
---
M src/soc/mediatek/mt8186/Makefile.inc
A src/soc/mediatek/mt8186/ddp.c
M src/soc/mediatek/mt8186/include/soc/addressmap.h
A src/soc/mediatek/mt8186/include/soc/ddp.h
4 files changed, 436 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/96/60396/4