[L] Change in coreboot[main]: soc/mediatek/mt8196: Add EINT support

[Yidi Lin (Code Review)]

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

Yidi Lin has uploaded a new patch set (#20) to the change originally created by Jarried Lin. ( https://review.coreboot.org/c/coreboot/+/84026?usp=email )

Change subject: soc/mediatek/mt8196: Add EINT support
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soc/mediatek/mt8196: Add EINT support

Add support to configure GPIOs to pull for external interrupts (EINT).

BUG=b:334723688
TEST=Talk with Ti50 TPM using IRQ flow.

Change-Id: Ibeb2dafcd9909b4afbfa81728700718f01d3818f
Signed-off-by: Yidi Lin 
---
M src/soc/mediatek/mt8196/Makefile.mk
A src/soc/mediatek/mt8196/gpio_eint.c
M src/soc/mediatek/mt8196/include/soc/addressmap.h
3 files changed, 317 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/26/84026/20