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

[Yu-Ping Wu (Code Review)]

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

Yu-Ping Wu has posted comments on this change by Jarried Lin. ( https://review.coreboot.org/c/coreboot/+/84026?usp=email )

Change subject: soc/mediatek/mt8196: Add EINT support
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Patch Set 8:

(2 comments)

File src/soc/mediatek/mt8196/eint.c:

https://review.coreboot.org/c/coreboot/+/84026/comment/a60fb5d4_57cb1d16?usp... :
PS8, Line 11: [4]
Use a struct:
```
struct eint_info {
    uintptr_t base;  // How about storing EINT_E_BASE directly?
    uint32_t index;
    uint32_t debounce;  // Is this unused?
};
```

Note that `eint_num` is not needed, because we are already using it as the array index.

https://review.coreboot.org/c/coreboot/+/84026/comment/ea41aa6a_8029ae23?usp... :
PS8, Line 13: {0, 2, 0, 1},
Can we put one entry `{a, b, c, d}` per line?