Add support for limiting SATA interface speed through the FSP parameter
'SataSpeedLimit'. This is useful for mainboards with physical design
constraints that require operating at lower speeds than what the
controller and drives support.
The implementation adds a new chip config option that mainboards can
set in their devicetree to control this behavior.
Change-Id: Ib0a058d006b752975c57851f2418a4e94b3bfcca
Signed-off-by: Kilian Krause <kilian.krause@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88951
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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