[M] Change in coreboot[master]: [WIP] soc/intel/common: Move pch_uart_init to common bootblock stage

[Stefan Reinauer (Code Review)]

Stefan Reinauer has abandoned this change. ( https://review.coreboot.org/c/coreboot/+/25891?usp=email )

Change subject: [WIP] soc/intel/common: Move pch_uart_init to common bootblock stage
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Abandoned

5 years and does not apply anymore. Rebase and reupload if still relevant