[S] Change in coreboot[master]: soc/mediatek/mt8188: Support ARM arch timer

[Yidi Lin (Code Review)]

Attention is currently required from: Hung-Te Lin, Yidi Lin, Yu-Ping Wu.

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

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

https://review.coreboot.org/c/coreboot/+/76919?usp=email

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

Change subject: soc/mediatek/mt8188: Support ARM arch timer
......................................................................

soc/mediatek/mt8188: Support ARM arch timer

Use ARM architectual timer by initializing frequency to 13 MHz. Since
system timer is the source of the architectual timer, we also call
`timer_prepare` in `init_timer`.

BUG=b:229800119
TEST=run `suite:faft_bios` to verify the firmware stability.
     check timestamps by cbmem.
Depend on CL:4747539

Change-Id: I8b1348044e4c92984510604b7f61611e13284d86
Signed-off-by: Yidi Lin 
---
M src/soc/mediatek/mt8188/Kconfig
M src/soc/mediatek/mt8188/Makefile.inc
A src/soc/mediatek/mt8188/timer.c
3 files changed, 33 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/76919/3