Change in coreboot[master]: soc/amd/stoneyridge: Remove unused SD controller

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/20401 )

Change subject: soc/amd/stoneyridge: Remove unused SD controller
......................................................................

Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/56406/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/11998/ : SUCCESS