Change in coreboot[master]: soc/mediatek/mt8186: Set RTC capid to 0xC0 to pass XTAL 26 MHz test

[Rex-BC Chen (Code Review)]

Attention is currently required from: Hung-Te Lin, Paul Menzel, Yu-Ping Wu.
Rex-BC Chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62290 )

Change subject: soc/mediatek/mt8186: Set RTC capid to 0xC0 to pass XTAL 26 MHz test
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Patch Set 7:

(1 comment)

File src/soc/mediatek/mt8186/rtc.c:

https://review.coreboot.org/c/coreboot/+/62290/comment/03f3a7e5_649bafc2 
PS6, Line 16: ((1 << 13) - (1 << 8))
> Can we use the GENMASK() macro?

this definition is not used.
I remove them in this patch:
https://review.coreboot.org/c/coreboot/+/62457