[XS] Change in coreboot[main]: soc/mediatek/mt8189: Add timer support

[Yidi Lin (Code Review)]

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

Yidi Lin has posted comments on this change by Vince Liu. ( https://review.coreboot.org/c/coreboot/+/85689?usp=email )

Change subject: soc/mediatek/mt8189: Add timer support
......................................................................

Patch Set 1:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/85689/comment/9a7db6ee_8b9528b8?usp... :
PS1, Line 9: Add timer support for MT8189.
           : 
           : The new ICs(e.g. mt8196, mt8189) will no longer use GPT, and in order
           : to improve code readability, the macro name TIMER_MHZ will be used.
Add ARM arch timer support for MT8189.