[coreboot-gerrit] Change in coreboot[master]: soc/sifive/fu540: add support boot from sdcard

[Xiang Wang (Code Review)]

Xiang Wang has abandoned this change. ( https://review.coreboot.org/c/coreboot/+/30901 )

Change subject: soc/sifive/fu540: add support boot from sdcard
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Abandoned

update https://review.coreboot.org/35119