[S] Change in coreboot[master]: soc/intel/common: Add common function to disable LT memory lock

[Jérémy Compostella (Code Review)]

Jérémy Compostella has restored this change. ( https://review.coreboot.org/c/coreboot/+/71655 )

Change subject: soc/intel/common: Add common function to disable LT memory lock
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Restored