[coreboot-gerrit] Change in coreboot[master]: src/security/intel: Use defines for segment registers

[Angel Pons (Code Review)]

Attention is currently required from: Patrick Rudolph.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59763 )

Change subject: src/security/intel: Use defines for segment registers
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Patch Set 1: Code-Review+2