Change in coreboot[master]: soc/intel/*: drop UART pad configuration from common code

[Lance Zhao (Code Review)]

Attention is currently required from: Michael Niewöhner.
Lance Zhao has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/48829 )

Change subject: soc/intel/*: drop UART pad configuration from common code
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Patch Set 26:

(1 comment)

Patchset:

PS26: 
The advantage of current implementation is people porting coreboot to different hardware not need to care about the detail mux setting just as simple as which uart port is using is good enough. And FSP will always program the GPIO pad base on uart selection base on FSP upd setting.