Change in coreboot[master]: soc/mediatek: Add mtk_early_init for passing data across sessions

[Jianjun Wang (Code Review)]

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

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

https://review.coreboot.org/c/coreboot/+/63019

to look at the new patch set (#3).

Change subject: soc/mediatek: Add mtk_early_init for passing data across sessions
......................................................................

soc/mediatek: Add mtk_early_init for passing data across sessions

Passing pcie timestamp from bootblock stage to ram stage, it can be used
for other modules if they needs to passing data across sessions.

TEST=Build pass and boot up to kernel successfully via SSD on Dojo
board, here is the SSD information in boot log:
 == NVME IDENTIFY CONTROLLER DATA ==
    PCI VID   : 0x15b7
    PCI SSVID : 0x15b7
    SN        : 21517J440114
    MN        : WDC PC SN530 SDBPTPZ-256G-1006
    RAB       : 0x4
    AERL      : 0x7
    SQES      : 0x66
    CQES      : 0x44
    NN        : 0x1
Identified NVMe model WDC PC SN530 SDBPTPZ-256G-1006

BUG=b:178565024
BRANCH=cherry

Signed-off-by: Jianjun Wang 
Change-Id: I01f91b7fe2cbe4f73b5c616bb7aae778dee27d9a
---
M src/soc/mediatek/common/Kconfig
A src/soc/mediatek/common/early_init.c
A src/soc/mediatek/common/include/soc/early_init.h
3 files changed, 79 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/63019/3