Change in coreboot[master]: soc/mediatek/mt8195: Initialize SPM

[Rex-BC Chen (Code Review)]

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

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

https://review.coreboot.org/c/coreboot/+/55140

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

Change subject: soc/mediatek/mt8195: Initialize SPM
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soc/mediatek/mt8195: Initialize SPM

This patch adds support for loading SPM firmware from CBFS to SPM SRAM.
SPM needs its own firmware to enable spm suspend/resume function which
turns off several resources such as DRAM/mainpll/26M clk when linux
system suspend.
This adds 20ms to the boot time.

TEST=program counter of SPM is correct value after booting up.

Change-Id: Ia0f9b9f86e44b293c1cc47213946304c64aea75e
Signed-off-by: Dawei Chien 
Signed-off-by: Edward-JW Yang 
---
M src/soc/mediatek/mt8195/Kconfig
M src/soc/mediatek/mt8195/Makefile.inc
M src/soc/mediatek/mt8195/include/soc/spm.h
A src/soc/mediatek/mt8195/spm.c
4 files changed, 1,157 insertions(+), 14 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/40/55140/2