[M] Change in coreboot[main]: soc/mediatek/mt8196: Add modem power driver to disable unused power

[Jarried Lin (Code Review)]

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

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

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

https://review.coreboot.org/c/coreboot/+/85651?usp=email

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

The following approvals got outdated and were removed: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

Change subject: soc/mediatek/mt8196: Add modem power driver to disable unused power
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soc/mediatek/mt8196: Add modem power driver to disable unused power

Disable MT6363 unused power:
vbuck5, vcn15, vrf09, vrf12, vrf13, vrf18, vsram_digrf, vsram_mdfe.
Disable MT6373 unused power:
vant18, vsim1, vsim2.

BUG=b:315894234
TEST=Build pass, Check there are no check failed logs. And check logs:
Vmodem value: 0x78 (means SPMI_SLAVE_4_750MV)

Signed-off-by: Xavier Chang 
Change-Id: Ia8808e3500727753e4537017b46ac8ab39d59468
---
M src/soc/mediatek/mt8196/Makefile.mk
A src/soc/mediatek/mt8196/include/soc/modem_power_ctrl.h
A src/soc/mediatek/mt8196/modem_power_ctrl.c
3 files changed, 112 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/51/85651/4