[S] Change in coreboot[master]: soc/mediatek/mt8188: Fix AP hang when enabling cpufreq-hw driver

[Liju-Clr Chen (Code Review)]

Attention is currently required from: Liju-Clr Chen, Paul Menzel, Rex-BC Chen.

Hello Hung-Te Lin, build bot (Jenkins), Rex-BC Chen, Yidi Lin, Yu-Ping Wu,

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

https://review.coreboot.org/c/coreboot/+/69088

to look at the new patch set (#7).

Change subject: soc/mediatek/mt8188: Fix AP hang when enabling cpufreq-hw driver
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soc/mediatek/mt8188: Fix AP hang when enabling cpufreq-hw driver

When enabling cpufreq-hw driver, MCUPM will conduct power tasks and
access some registers of the other hardware. There are some registers
configured as secure read/write due to the hardware design. So we
enable sideband to allow MCUPM to access the secure registers.

BUG=b:236331463
TEST=It works well after boot to login shell.

Change-Id: I67b08c38a31a7eae1bc59543a5148a78b61456d6
Signed-off-by: Liju-Clr Chen 
---
M src/soc/mediatek/mt8188/devapc.c
M src/soc/mediatek/mt8188/include/soc/devapc.h
2 files changed, 24 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/88/69088/7